Chemistry High School
Answers
Answer 1
The van't Hoff factor for this solution is 1.66.
K(f) of water is 1.86 °C/m
Depression of freezing point, Δ t (f) =T (solvent) -T (soln) = 0° C - (- 4.7° C) = 4.7° C
KCI ⇆ K⁺ + Cl ⁻
mass of KCl = 17.0g
Molar mass of KCI = 74.55 g/mol
Number of moles of KCl = 17.0g × mol/74.55 g = 0.228 mol
Mass of solvent = 150g × (kg)/(1000g)
molality of the solution,
m = (0.228mol)/(0.15kg) = 1.52 m
Δt(f) = i × k(f) × m
Substituting the values,
4.70 °C = i x 1.86 °C/m x 1.52 m
⇒ i = 4.70°C/(1.86°C/mx1.52 m)
⇒ i = 1.66
Hence, the van't Hoff factor is 1.66
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Related Questions
Aldehydes have a central carbon bound to two other carbons true false
Answers
Commonly, aldehydes consist of a carbon atom bound to one carbon but one hydrogens. Aldehydes have a strong polarity, which makes them very reactive.
Are aldehydes harmful to people?
Aldehydes are heterocyclic compounds that are abundant in the environment and can be found in both natural and man-made sources. The aldehydes are often hazardous to the body since they are reactive species.
What impacts the body does aldehyde have?
Your blood absorbs some of the acetaldehyde, harming your membranes and perhaps leading to the formation of scar tissue. Additionally, it results in a hungover and that may bring on symptoms like a headache, an upset stomach, or an increased pulse. The most vulnerable organ to acetaldehyde toxicity is the brain. It disrupts brain function and may deteriorate memory.
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an electron in an orbital that penetrates close to the nucleus will tend to experience a higher effective nuclear charge than one that does not. True or False ?
Answers
True. There is a tendency for an electron in an orbital that enters the nucleus to have a larger effective nuclear charge than an electron in an orbital that does not.
What is electrons?
Outside of an atom's nucleus, electrons are negatively charged particles that make up the atom. They are in charge of an atom's chemical and physical properties and inhabit the electron shells or orbitals of an atom.
This is due to the higher attraction between an electron and the positive charge of the nucleus the closer the electron is to the nucleus. The actual nuclear charge less the shielding provided by the electrons in the inner shells is the effective nuclear charge that an electron experiences. Due to the shielding effect of the inner electrons, electrons that are further from the nucleus suffer a decreased effective nuclear charge. Because of this, electrons in orbitals that enter the nucleus closely will have a larger effective nuclear charge and be more tightly bonded to the nucleus, compared to electrons in orbitals that enter the nucleus more distantly.
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magnifying the bronze piece 100,000,000 times to see an individual atom is the same amount of magnification as beginning by looking at the whole u.s. from a satellite and zooming until you see:
Answers
Answer: A bug in the
Explanation:
Magnifying a bronze piece 100,000,000 times to see an individual atom is not the same amount of magnification as looking at the whole United States from a satellite and zooming in until you see a specific object.
Magnifying a bronze piece to see an individual atom, the magnification factor is extremely large, on the order of [tex]10^{8}[/tex] or 100,000,000 times. However, when looking at the whole United States from a satellite, even with significant zoom, the magnification factor would not be anywhere near this large. The level of magnification would depend on the altitude of the satellite and the size of the object being viewed, but even with the highest resolution satellite imagery, the magnification would still be orders of magnitude smaller than 100,000,000 times.
So, the comparison between these two scenarios is not equivalent and the level of magnification is vastly different.
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How many moles of carbon dioxide would be contained in 6.0 L at 132.0 kPa and 47°C?
Answers
2 moles of carbon dioxide would be contained in 6.0 L at 132.0 kPa and 47°C. This law is a generalization that includes both Boyle's and Charles' laws.
What is ideal gas?
The ideal gas, sometimes known as the perfect gas, is a gas that, in physical behavior, corresponds to a certain idealized connection between pressure, volume, speed temperature known as the perfect, or general, gas law.
This law is a generalization that includes both Boyle's and Charles' laws as special instances, and it asserts that for a given quantity of gas, the product of volume V and pressure P is proportional to absolute temperature T; that is, PV = kT, where k is a constant. This type of relationship for a material is known as its equation of state, and it is adequate to define its gross behavior.
P×V= n×R×T
substituting all the given values in the above equation, we get
132.0×6.0 = n×8.314×47
n = 2 moles
Therefore, 2 moles of carbon dioxide would be contained in 6.0 L at 132.0 kPa and 47°C.
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2.26 (a) calculate %ic of the interatomic bonds for the intermetallic compound tial3. (b) on the basis of this result what type of interatomic bonding would you expect to be found in tial3?
Answers
(a) The interatomic bond for the TiAl₃ intermetallic compound is 1.76%.(b) Based on the results, the type of interatomic bond found in TiAl₃ is metallic bond
The percentage of ionic characters in compounds that have several covalent characters can be calculated by the following equation:
Percent ionic character = observed dipole moment / calculated dipole moment, assuming 100% * 100 ionic bond
The % ionic character is a function of the electronegativity of the XA and XB ions.
The electronegativity of titanium, X[tex]__{Ti}[/tex] = 1.54The electronegativity of aluminum, X[tex]__{Al}[/tex] = 1.61
Percentage of ionic character for TiAl₃ ;
%IC = {1-exp [-0.25(X[tex]__{Ti}[/tex] - X[tex]__{Al}[/tex])]} * 100
= {1-exp [-0.25(-0.07)]} * 100
= {1-exp [0.0175)]} * 100
= {1-1.0176} * 100
= {0.176} * 100
= 1.76%
Since the percent ionic character is very small (1.76%), and this intermetallic compound is composed of two metals Al and Ti, the bond is strictly metallic.
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Molybdenum has an atomic number of 42. This means that molybdenum_________
a.has a freezing point of 42 degrees Fahrenheit.
b.belongs to Group 42 on the Periodic Table.
c.Can form 42 bonds with other atoms.
d.contains 42 protons in its nucleus.
Answers
Molybdenum has an atomic number of 42. This means it contains nucleus with 42 protons.
What is atomic number?
The quantity of protons in the atoms' nuclei is known as an element's atomic number.
Molybdenum has an atomic number of 42, which indicates that it has 42 protons in its nucleus. All isotopes of an element have the same number of protons in their nuclei, and the number of protons in an atom's nucleus establishes the identity of the element. The number of neutrons, the other subatomic particles in an atom's nucleus, might differ amongst isotopes of the same element. The freezing point, bonding capacity, or group placement of an element in the periodic table are not directly correlated with the atomic number.
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why does the size of an atom decrease as you move across a period?
Answers
Because of the atomic number, the size of an atom shrinks over a time.
What is atomic number?
The quantity of protons in the atom's nucleus is known as an element's atomic number. An element's atomic number uniquely identifies it and establishes where it belongs in the periodic table. The chemical characteristics of an element, such as its valence electrons and reactivity, are also influenced by its atomic number.
Because the atomic number, or number of protons in the nucleus, rises while the electron shell stays at a constant distance from the nucleus, the size of an atom shrinks as you move over a period. The atomic size is reduced as a result of the stronger attraction between the nucleus and electrons that occurs from the increase in the number of protons in the nucleus. Further strengthening the attraction between the electrons and the nucleus as you move throughout the period is a decrease in the electron shielding effect. Even though there are more electron shells present, this results in a reduction in atomic size.
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Can anyone help me with all of these?
Answers
The frequency and the wavelength are;
1) 4 * 10^-5 m
2) 2 * 10^-7 m
3) 4.4 * 10^13 Hz
4) 4.6 * 10^14 Hz
5) 4.5 * 10^-7 m
What is the frequency of light?
From the fact that;
c = λf
c = Speed of light
λ = wavelength
f = frequency
1) λ = 3 * 10^8/7.5 * 10^12
λ = 4 * 10^-5 m
2) λ = 3 * 10^8/1.5 * 10^15
λ = 2 * 10^-7 m
3) f = c/ λ
f = 3 * 10^8/6.8 * 10^-5
f = 4.4 * 10^13 Hz
4) f = 3 * 10^8/6.5 * 10^-7
f = 4.6 * 10^14 Hz
5) λ = c/f
= 3 * 10^8/6.6 * 10^14
= 4.5 * 10^-7 m
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The Site Where Communication Occurs Between Neurons Through The Release Of Chemicals Is Called ? A. Axon B. Synapse C.Cell Body D. Dendrit
Answers
Site of Neuronal Communication, where Chemicals are Released Synapse: The connection between a neuron's axon and dendrite at which two neurons exchange information.
How do synapses function?
The connectors known as synapses are where neurons converse with one another. At the synapse, a neuron connects with an aim cortex cell. Chemical messengers are used by most synapses to interact with one another.
What does a brain synapse do?
Synapses are the points where neurons connect and communicate. Each neuron has anything from a few to hundreds of millions of synaptic connections, which may be with other neurons inside its own part of the brain, neurons nearby, or neuron in other regions.
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a student completes her titration and determines the volume of naoh needed to reach the endpoint of the titration. her data is shown below. taking outliers into account, should all four trials be used in the average calculation in each data set? data set 1 trial volume trial 1 23.11 ml trial 2 23.20 ml trial 3 21.22 ml trial 4 23.17 ml choose... data set 2 trial volume trial 1 46.44 ml. trial 2 46.24 ml trial 3 46.20 ml trial 4 46.39 ml choose...
Answers
If the data is considered to be accurate and consistent, all four trials in each data set should be used in the average calculation.
However, if one or more of the trials are significantly different from the other trials, it may be best to exclude those trials as outliers and only use the remaining trials in the average calculation.
In data set 1, trial 3 (21.22 mL) is significantly lower than the other trials, so it could be considered an outlier and excluded from the average calculation.
In data set 2, all of the trials are relatively close in value and within a reasonable range, so all four trials can be used in the average calculation.
It is important to carefully examine the data and consider any outliers in order to determine the most appropriate approach for calculating the average volume of NaOH needed to reach the endpoint of the titration.
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if your new destination list needs a water park adventure, we gathered the top contenders in the world for your consideration. nrh2o in texas brought us a slide that enjoys the badge of being
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The world's largest uphill water ride. The water park, NRH2O in Texas, boasts a slide that has the distinction of being the world's largest uphill water ride.
This means that the slide has been designed in such a way that it provides a unique and thrilling experience to water park-goers by allowing them to travel uphill on their raft or inner tube. This type of ride is rare and provides a different type of experience compared to traditional water slides that follow a downhill slope. NRH2O in Texas is one of the top contenders for a water park adventure and is a must-visit destination for those who are looking for an exciting and unique water ride experience.
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Complete question:
If your new destination list needs a water park adventure, we gathered the top contenders in the world for your consideration. NRH2O in Texas brought us a slide that enjoys the badge of being _____________
What is the direct transfer of phosphate between substrates is called?
Answers
Substrate-level phosphorylation is the term used to describe the direct transfer for phosphate between substrates.
What exactly do you mean by phosphate?
In chemistry, a phosphate is an anion, salts, functional group, an ester made from phosphoric acid. Most frequently, it refers to orthophosphate, which is a product of orthophosphoric acid (also known as phosphoric acid) H3PO4. One phosphorus atom is joined with four oxygen atoms to form a phosphate. A phosphate group is what happens when a phosphate molecule is joined to a carbon-containing molecule.
What is phosphate's primary use?
In the development of bone and teeth, phosphate is helpful. Additionally, phosphorus is a component of a number of essential compounds, such as those that the cell uses for DNA, cell membranes, and energy (deoxyribonucleic acid).
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I need help with both questions on this picture please and thank you very much
Answers
1. The type of reaction shown in tge given reaction is a single displacement reaction.
The correct option is C.
2. The type of reaction shown in tge given reaction is a double displacement reaction.
The correct option is D.
What are single displacement and double displacement reactions?
Single displacement reactions are reactions in which a radical or an element displaces or replaces another radical or element in a compound.
It is shown below as follows:
AB + C ---> AC + B
Double displacement reactions are reactions in which an exchange of radicals or elements occurs between two compounds when they are mixed together.
It is shown below as follows:
AB + CD---> AC + BD
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Is the dissolution reaction of ammonium nitrate enthalpy favored? a. No, it is not enthalpy favored since the chemical system loses energy. b. Yes, it is enthalpy favored since the chemical system loses energy. c. No, it is not enthalpy favored since the chemical system gains energy. d. Yes, it is enthalpy favored since the chemical system gains energy. e. No, it is not enthalpy favored since the chemical system neither gains nor loses energy.
Answers
c. No, it is not enthalpy favored since the chemical system gains energy.
What causes a spontaneous endothermic reaction when ammonium nitrate dissolves in water?
If the temperature of the water lowers while ammonium nitrate dissolves in it, the process is endothermic and heat is absorbed by the system.
What happens when ammonium nitrate is dissolved?
Through the process of dissociation into its individual ions, ammonium nitrate readily dissolves in water. Because it was created from a strong acid (HF) and a weak base (NH3), this salt has an acidic character (HNO3). This reaction is extremely exothermic and it happens quickly.
An explanation of spontaneous chemical reactions Was this response a spontaneous one, and if not, why not?
A spontaneous reaction favorsone that favorsthe creation of products in the environment in which it is taking place. A campfire that is roaring is an exothermic example of a spontaneous reaction.
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Label the plate boundaries and name a geologic feature that occurs at each plate
boundary
Answers
Note that the three types of plate boundaries are:
TransformConvergent and Divergent plate boundaries.
What geological features can be found in each type of boundary?
The geological features that can occur in each type of boundary are given as follows:
1) Divergent plate boundaries occur when plates move apart and magma rises to the surface to form new crust. A geologic feature that occurs at a divergent plate boundary is a mid-ocean ridge.
2) Note that convergent plate boundaries occur when plates collide and one plate is forced beneath the other, into the mantle. A subduction zone is a geologic feature at a convergent plate boundary.
3) In the case of transform plate boundaries, it occurs when plates slide past each other along a transform fault. A geologic feature that occurs at a transform plate boundary is a strike-slip fault.
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on a phase diagram, the critical temperature is . question 20 options: a) the temperature required to cause sublimation of a solid b) the temperature at which all three states are in equilibrium c) the temperature below which a gas cannot be liquefied d) the temperature above which a gas cannot be liquefied e) the temperature required to melt a solid
Answers
the critical temperature is, the temperature above which a gas cannot be liquefied.
What's the temperature at which something is critical?
The greatest temperature at which a substance may exist as a liquid is known as the temperature of the substance.The substance at question (in its vapour or gaseous state) cannot be liquefied at temperatures higher than the critical temperature, no matter how much pressure is applied.
What is the critical point of sublimation?
The evaporation critical point is the highest or lowest temperature and pressure at which the state of the substance could be changed.
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Chemistry help please and thank you so much
Answers
In a chemical equation, reactants are substances before the reaction, subscripts are numbers added in front of chemical formula, chemical formula is representation of elements in compound,products are substances present after chemical reaction, coefficients are numbers showing the amount of individual atoms.
What is chemical equation?
Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
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Energy Change in Chemical Reactions: Reflect
Write a reflection about your learning in this unit. Your reflection should be at
least 3 sentences. Use the following sentence starters as a guide.
• I feel confident about creating energy diagrams because...
It is challenging to figure out which bonds are broken in a reaction
because...
• One strategy I used to figure out whether energy is gained or lost in a
system was to...
• To remember definitions of vocabulary words in this unit, one strategy I
used was...
Answers
Answer:
hi
I feel confident about creating energy diagrams because I have been practicing creating energy diagrams for different reactions and understanding how to interpret them. It is challenging to figure out which bonds are broken in a reaction because it requires a good understanding of chemical bonds and reaction mechanisms. One strategy I used to figure out whether energy is gained or lost in a system was to calculate the change in enthalpy using the bond energies of the reactants and products. To remember definitions of vocabulary words in this unit, one strategy I used was to create flashcards and quiz myself regularly on their meanings. Overall, this unit has helped me understand how energy is involved in chemical reactions and how it affects the stability of a system.
each student in a class placed a 2.00 g sample of a mixture of cu and al in a beaker and placed the beaker in a fume hood. the students slowly poured 15.0 ml of 15.8 m hno3(aq) into their beakers. the reaction between the copper in the mixture and the hno3(aq) is represented by the equation above. the students observed that a brown gas was released from the beakers and that the solutions turned blue, indicating the formation of cu2 (aq). the solutions were then diluted with distilled water to known volumes. the students determined that the reaction produced 0.010 mol of cu(no3)2 . based on the measurement, what was the percent of cu by mass in the original 2.00 g sample of the mixture?
Answers
The percent of Cu by mass in the original 2.00 g sample of the mixture is approximately 120.75%.
Determining the Percentage of Copper in a Mixture
In this experiment, students placed a 2.00 g sample of a mixture of copper (Cu) and aluminum (Al) in a beaker and added 15.0 ml of 15.8 M HNO3(aq) to it. The reaction between the copper and the HNO3(aq) produced a blue solution, indicating the formation of Cu(NO3)2, and a brown gas, which was nitrogen dioxide (NO2). The students then diluted the solution with distilled water to a known volume and determined that the reaction produced 0.010 mol of Cu(NO3)2. By using the molar mass of Cu(NO3)2, the mass of copper in the original sample was calculated as 2.415 g. Finally, the percentage of copper in the original 2.00 g sample of the mixture was determined to be approximately 120.75% by dividing the mass of copper by the total mass of the sample and multiplying it by 100%.
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jamila makes zinc sulfate
she uses an acid and zinc metal
the diagram shows the stages jamila uses to make zinc sulfate
the stages are not in the correct order
Answers
The diagram shows the stages jamila uses to make zinc sulfate and the stages in the correct order include the following below:
Add excess zinc to the acid then gently heat.Filter the reaction mixture.Dry the zinc sulfate with filter papers.Heat the filtrate to concentrate the solution.Leave the filtrate to evaporate slowly.
What is Filtration?
This is referred to as a process used to separate solids from liquids or gases using a filter medium.
In the formation of zinc sulfate, the zinc is usually added to concentrated H₂SO₄ and filtered with the use of filter paper through several techniques to ensure that the filtrate is dry and concentrated.
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what is the mass percent of oxygen in propionic acid, c3h6o2?
Answers
Answer:
43.23%.
Explanation:
The mass percent of oxygen in propionic acid (C3H6O2) can be calculated by dividing the mass of oxygen in the molecule by the total mass of the molecule and multiplying by 100.
First, find the molar mass of propionic acid:
C3H6O2 = 3 x 12.01 + 6 x 1.01 + 2 x 16.00 = 74.08 g/mol
Next, find the mass of oxygen in one mole of propionic acid:
2 x 16.00 g = 32.00 g
Finally, divide the mass of oxygen by the total mass and multiply by 100:
(32.00 g / 74.08 g) x 100% = 43.23%
So, the mass percent of oxygen in propionic acid is 43.23%.
How can snowfall be caused by air mass movement and changes?
Answers
A violent change in weather occurs as the cold air mass digs underneath the warm air mass creating thunderstorms and snowstorms in the winter.
What is weather?
Weather is the state of the atmosphere, describing for example the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy.On Earth, most weather phenomena occur in the lowest layer of the planet's atmosphere, the troposphere,just below the stratosphere.
Weather refers to day-to-day temperature, precipitation, and other atmospheric conditions, whereas climate is the term for the averaging of atmospheric conditions over longer periods of time.When used without qualification, "weather" is generally understood to mean the weather of Earth.
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a combination of two or more atoms of the same type is called?
Answers
A molecule is made up of two maybe more atoms that are chemically linked together, regardless they be of the same component or distinct ones. In the natural world, molecules of oxygen exist.
What is the straightforward meaning of a molecule?
Pay attention to how it sounds. a material's smallest unit that contains both its chemistry and physical properties. A molecule is made up of one or more ions.
Water: A Molecule or Not?
Molecules are created when atoms come together. Two hydro (H) atoms but one oxygenation (O) atom make up the three atoms that make up a water molecule. As a result, water is sometimes shortened as H2O.There are hundreds of water molecules in a single drop of liquid.
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a 25.0 ml sample of concentrated h3po4 (14.7 m) is diluted to a final volume of 750.0 ml. what is the molarity of the final solution? group of answer choices
Answers
The molarity of the final solution is 0.368 M.
Phosphoric acid, also known as orthophosphoric acid, monophosphoric acid, or phosphoric(V) acid, is an inorganic solid with the chemical formula H3PO4 that contains phosphorus.
This can be calculated using the equation [tex]M1V1 = M2V2,[/tex]
where [tex]M1[/tex] is the molarity of the concentrated [tex]H3PO4 (14.7 M)[/tex]
[tex]V1[/tex] is the volume of the concentrated [tex]H3PO4 (25.0 mL)[/tex]
[tex]M2[/tex] is the molarity of the diluted solution (unknown)
and [tex]V2[/tex] is the volume of the diluted solution, may be used to determine this [tex](750.0 mL)[/tex]
When the given numbers are plugged in, the result is
[tex](14.7 M)(25.0 mL) = M2(750.0 mL),[/tex]
[tex]M2 = 0.368 M.[/tex]
The Molarity of final solution is 0.368M
It is frequently found as an 85% aqueous solution, which is a syrupy liquid that is colourless, odourless, and non-volatile. It is a significant industrial chemical that is used in several fertilisers.
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complete question:
A 25.0 mL sample of concentrated H3PO4 (14.7 M) is diluted to a final volume of 750.0 mL. What is the molarity of the final solution?
Group of answer choices
0.368
0.750
0.490
0.980
the mass in grams of 7.5 moles of AI(OH)3
Answers
The mass (in grams) of 7.5 moles of aluminum hydroxide, Al(OH)₃ is 585 grams
How do I determine the mass of Al(OH)₃
We'll begin by obtaining the molar mass of Al(OH)₃. Details below:
Molar mass of Al = 27 g/molMolar mass of O = 16 g/molMolar mass of H = 1 g/molMolar mass of Al(OH)₃ =?
Molar mass of Al(OH)₃ = 27 + 3[16 + 1]
Molar mass of Al(OH)₃ = 27 + 3[17]
Molar mass of Al(OH)₃ = 27 + 51
Molar mass of Al(OH)₃ = 78 g/mol
Finally, we shall determine the mass of 7.5 moles of Al(OH)₃. Details below:
Mole of Al(OH)₃ = 7.5 moles Molar mass of Al(OH)₃ = 78 g/molMass of Al(OH)₃ =?
Mole = mass / molar mass
Cross multiply
Mass = Mole × molar mass
Mass of Al(OH)₃ = 7.5 × 78
Mass of Al(OH)₃ = 585 g
Thus, we can conclude that the mass of Al(OH)₃ is 585 g
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What is the name of the compound NO2?
Responses
A nitrous oxidenitrous oxide
B nitrogen dioxide
Answers
Answer:
Nitrogen Dioxide (NO2) is one of a group of highly reactive gases known as oxides of nitrogen or nitrogen oxides (NOx). Other nitrogen oxides include nitrous acid and nitric acid. NO2 is used as the indicator for the larger group of nitrogen oxides. NO2 primarily gets in the air from the burning of fuel.
question which is a disadvantage of natural gas? responses high sulfur emissions high sulfur emissions groundwater contamination groundwater contamination high carbon dioxide emissions high carbon dioxide emissions significant waste disposal
Answers
One disadvantage of natural gas is significant waste disposal. Natural gas extraction and processing generates a significant amount of waste in the form of drill cuttings, wastewater, and air pollution.
This waste can be harmful to the environment if not properly disposed of, potentially contaminating soil and water resources. The release of pollutants such as methane and volatile organic compounds during the production and transportation of natural gas can also contribute to air pollution and have negative impacts on public health. Additionally, while natural gas is a cleaner burning fossil fuel compared to coal and oil, it still releases carbon dioxide into the atmosphere, contributing to climate change.
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when you read the label on a chemical container, what are the 3 most important pieces of information? (choose three answers.)
Answers
1. Product identity (what the chemical is)
2. Hazard warnings (what the chemical can do to harm you or the environment)
3. Handling instructions (how to safely use, store, and dispose of the chemical)
Product identity:
The name or identifier of the chemical substance is the most important piece of information on the label.This information allows you to identify what the chemical is, its intended use, and its potential hazards.This information helps you determine if the chemical is appropriate for your intended use and if there are any special precautions you need to take when handling it.
Hazard warnings:
The label should indicate the dangers posed by the chemical, such as flammability, toxicity, and reactivity.This information allows you to make informed decisions about the safe use, storage, and disposal of the chemical.Hazard warnings may include symbols, such as a flame to indicate flammability or a skull and crossbones to indicate toxicity.
Handling instructions:
The label should provide information on how to safely handle, store, and dispose of the chemical.This information is critical for preventing accidents and protecting both you and the environment from harm.Handling instructions may include information on protective equipment, such as gloves or a respirator, that should be used when handling the chemical, as well as any storage requirements or disposal procedures.
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Use stoichiometry calculations and show all work:
calculate how many grams of water one could produce if 3.35 grams of H3PO4 react completely.
Reaction: H3PO4(aq) + 3LiOH(aq) = 3H2O(l) + Li3PO4(aq)
Answers
Answer:
Explanation:
To calculate the amount of water produced from the reaction of H3PO4 and LiOH, we can use stoichiometry. We will use the balanced chemical equation:
H3PO4(aq) + 3LiOH(aq) = 3H2O(l) + Li3PO4(aq)
The equation tells us that 1 mole of H3PO4 reacts with 3 moles of LiOH to produce 3 moles of H2O and 1 mole of Li3PO4.
First, we need to convert the amount of H3PO4 (3.35 g) to moles:
3.35 g H3PO4 / 98 g/mol = 0.0342 mol H3PO4
Next, we'll use the mole ratio from the balanced equation to determine the amount of LiOH required:
0.0342 mol H3PO4 * (3 mol LiOH / 1 mol H3PO4) = 0.1026 mol LiOH
Finally, we'll use the mole ratio from the balanced equation to determine the amount of water produced:
0.0342 mol H3PO4 * (3 mol H2O / 1 mol H3PO4) = 0.1026 mol H2O
Converting the amount of water produced (0.1026 mol) to grams:
0.1026 mol H2O * 18 g/mol = 1.84 g H2O
So, if 3.35 grams of H3PO4 react completely with LiOH, 1.84 grams of water would be produced.
a certain reaction has an activation energy of 70.81 kj/mol. at what kelvin temperature will the reaction proceed 4.50 times faster than it did at 365 k?
Answers
387.27K temperature will the reaction proceed 6.00 times faster than it did at 337 K.
k2 is 6 times k1 and hence k2/k1 = 6
we have ln(k2/k1) = Ea/R (1/T1- 1/T2)
ln(6) = 38670/8.314 x( 1/337 -1/T2)
0.00038522 = (1/337 -1/T2)
1/T2 = 0.0033525
T2=387.27K
In chemistry and physics, activation electricity is the minimal amount of electricity that has to be supplied for compounds to result in a chemical reaction. The activation energy of a reaction is measured in joules per mole, kilojoules in keeping with mole, or kilocalories consistent with mole.
Activation strength is described as the minimum quantity of strength required via a reacting molecule to get transformed into a product. it may additionally be defined because the minimal amount of energy had to prompt or energize molecules or atoms in an effort to go through a chemical reaction or transformation. In transition-state theory, activation electricity is the distinction in electricity content material between atoms or molecules in an activated or transition-country configuration and the corresponding atoms and molecules in their initial configuration.
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Complete Question:
A certain reaction has an activation energy of 38.67 kJ/mol. At what Kelvin temperature will the reaction proceed 6.00 times faster than it did at 337 K?
