1) Consider the dissolution of CaCO3 compound in aqueous medium.
a) Write down the equation of the chemical reaction that represents this dissolution.
b) Write the expression of the equilibrium constant for this reaction.
c) Explain how the addition of a certain amount of sodium carbonate to
water would affect this balance
2) The equilibrium constant for the reaction 2 SO2(g) + O2(g) 2 SO3(g) has a Kc value = 2.5x10^10 to 500 K. Find the kc value for each of the following reactions at the same temperature
(a) SO2(g) +1/2 O2 SO3(g).
(b) SO3(g) SO2(g)+1/2 O2(g)
(c) 3SO3(g)+ 3/2 O2(g) 3SO3(g)
3) A reaction mixture consisting of 0.400 mol H 2 and 1.60 mol I 2 was prepared in a 3.00 L flask and heated. In balance, 60.0% of the hydrogen gas reacted. What is the equilibrium constant for the reaction H 2(g) + I 2(g) 2 HI(g) at this temperature?
Answers
Explanation:
1a) CaCO₃(s) → Ca²⁺(aq) + CO₃²⁻(aq)
1b) Remember, solids are not included in the equilibrium equation.
K = [Ca²⁺] [CO₃²⁻]
1c) Adding CO₃²⁻ ions will shift the reaction to the left, producing CaCO₃(s) until equilibrium is restored.
2) 2 SO₂(g) + O₂(g) → 2 SO₃(g)
Kc = 2.5×10¹⁰ = [SO₃]² / ([SO₂]² [O₂])
2a) SO₂(g) + ½ O₂(g) → SO₃(g)
Kc = [SO₃] / ([SO₂] [O₂]^½)
Kc² = [SO₃]² / ([SO₂]² [O₂])
Kc² = 2.5×10¹⁰
Kc ≈ 1.58×10⁵
2b) SO₃(g) → SO₂(g) + ½ O₂(g)
Kc = [SO₂] [O₂]^½ / [SO₃]
Kc = 1 / (1.58×10⁵)
Kc ≈ 6.33×10⁻⁶
2c) 3 SO₂(g) + ³/₂ O₂(g) → 3 SO₃(g)
Kc = [SO₃]³ / ([SO₂]³ [O₂]^³/₂)
Kc = ([SO₃] / ([SO₂] [O₂]^½))³
Kc = (1.58×10⁵)³
Kc ≈ 3.95×10¹⁵
3) H₂(g) + I₂(g) → 2 HI(g)
K = [HI]² / ([H₂] [I₂])
Make an ICE table.
\(\left[\begin{array}{cccc}&Initial&Change&Equilibrium\\H_{2}&0.400&-0.240&0.160\\I_{2}&1.60&-0.240&1.360\\HI&0&+0.480&0.480\end{array}\right]\)
K = (0.480)² / (0.160 × 1.360)
K = 1.06
Related Questions
State the coefficient required to correctly balance the following chemical equation:
__KCI + __Fe —-> __FeCI2+ __K
Answers
Answer:
2KCl+Fe---->FeCl2+2K
Explanation:
You can observe that the no.of atoms in reactant side is equal to that of products side of each element.
If two orbitals have the same (n + 1) value, the orbital with the
lower value of n has energy and therefore it is filled
first.
a Lower
b Higher
C Zero
d None of the above
Answers
Answer:
B
Explanation:
it is filled with energy so it's high
What volume will 28 grams of nitrogen gas occupy at 27 Celsius and a
pressure of 785 mm Hg?
Answers
Answer: \(2.49\ m^3\)
Explanation:
Given
Mass of nitrogen present \(m=28\ g\)
Temperature \(T=27^{\circ}C\equiv 300\ K\)
Pressure \(P=785\ mm\ \text{of}\ Hg\ \text{or}\ 1.032\ atm\)
The molar mass of Nitrogen \(M=28\ g/mol\)
No of moles of nitrogen present
\(n=\dfrac{m}{M}\\\\n=\dfrac{28}{28}\\\\n=1\)
Using \(PV=nRT\)
\(\Rightarrow 1.032\times V=1\times 8.314\times 300\\\\\Rightarrow V=\dfrac{2494.2}{1.032}\\\\\Rightarrow V=2494.2\ L\ \text{or}\ 2.49\ m^3\)
What is the mass of carbon monoxide (CO) gas if the gas occupies a volume of 4.1 L at 2.0 atm of pressure and -73oC?
Answers
Answer:
1.7
Explanation:
Which of the following reagents might serve as the basis for a simple chemical test that would
distinguish between pure 1-hexene and pure hexane?
A) Bromine in carbon tetrachloride D) All of the above
B) Dilute aqueous potassium permanganate E) Answers A) and B) only
C) 10% sodium hydroxide solution
Answers
A) Bromine in carbon tetrachloride would serve as the basis for a simple chemical test that would distinguish between pure 1-hexene and pure hexane.
The correct option is A
When bromine in carbon tetrachloride is added to 1-hexene, the reddish-brown color of the bromine solution disappears due to the addition reaction between 1-hexene and bromine, forming colorless dibromohexane.
However, when bromine in carbon tetrachloride is added to hexane, the solution retains its reddish-brown color because hexane cannot react with bromine.
B) Dilute aqueous potassium permanganate and C) 10% sodium hydroxide solution would not distinguish between 1-hexene and hexane as they cannot react with these compounds in a distinctive way.
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Gino made a table to describe parts of the electromagnetic spectrum. A 3-column table with 4 rows. The first column labeled wave has entries ultraviolet, radio waves, infrared, x-rays. The second column labeled frequency has entries high, very low, low, high. The third column labeled Wavelength has entries long, very long, long, short. What mistake did Gino make? X-rays should have a low frequency and a long wavelength. Infrared light should have a high frequency, not a low frequency. Radio waves should have a very high frequency and a very short wavelength. Ultraviolet light should have a short wavelength, not a long wavelength.
Answers
Answer:
D. Ultraviolet light should have a short wavelength, not a long wavelength.
Explanation:
just took the quiz on Ed
The mistake Gino made is, ultraviolet light should have a short wavelength, not a long wavelength.
What is electromagnetic spectrum?Electromagnetic spectrum is the arrangement of electromagnetic radiations in the order of increasing frequency or decreasing wavelength.
Examples electromagnetic radiations based on increasing wavelength include;
Gamma rays X raysUltravoilet raysVisible lightInfrared lightMicrowavesRadio wavesThus, the mistake Gino made is, ultraviolet light should have a short wavelength, not a long wavelength.
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The chemical formula of ethanol is C₂H5OH. How many atoms are in 1.73 mol of ethanol?
Answers
Ethanol has the chemical formula C2H5OH. There will be twice as many carbon atoms as molecules, or two at a time 7.65 times Ten to something like a total of around 23.
What is the purpose of ethanol?When diluted, alcoholic beverages contain ethanol. It is used as a topical therapy to combat staph infections as well as in cosmetics, fragrances, and medicinal compounds. Bioethanol, ethanol, and denatured alcohol are examples of monohydric solvents, each of which has just one hydroxyl group.
Exactly how is ethanol made?Corn is the most widely used ingredient in ethanol produced domestically. It can also be produced utilizing cellulosic feedstocks such crop waste and wood, however this is less common. The majority of ethyl acetate plants in the US have been situated in the Midwest due to their proximity.
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Which statement is true about how scientists draw conclusions from data?
A. Scientists do not allow others to make conclusions about their data.
B. Teams of scientists never share their data to help other teams draw conclusions.
C. Any two scientists will always come to the same conclusion about a data set.
D. Two scientists may have different underlying assumptions that lead them to different conclusions about the same data.
Answers
Scientists are biased, and want to prove their specific hypothesis is right.
Answer:
D. Two scientists may have different underlying assumptions that lead them to different conclusions about the same thing.
Explanation:
It's all about how a person analyzes data. Some do it mathmatically while others do it logically. By doing it different ways, you may still come to the same conclusion, despite working at the problem in a different way.
Mechanical weathering does not change a rock’s
A
shape.
B
size.
C
appearance.
D
composition.
Answers
Answer:
C
Explanation:
Answer:
B: Size
Explanation: It can break it into smaller pieces but not change its composition.
what are thetypes of luminous flame
Answers
Types of luminous flames:
1. Yellow Luminous Flame
2. Smoky Luminous Flame
3. Orange Luminous Flame
4. Blue Luminous Flame
Luminous flames are characterized by their visible glow, which is caused by the incomplete combustion of fuel. The presence of soot particles in the flame causes the emission of light. There are different types of luminous flames, which can be classified based on their fuel composition and burning conditions. Here are some common types of luminous flames:
1. Yellow Luminous Flame: This is the most common type of luminous flame, often seen in open fires, candles, and gas stoves. It appears yellow due to the presence of soot particles in the flame. Yellow flames indicate incomplete combustion of hydrocarbon fuels, such as methane, propane, or natural gas. The high carbon content in these fuels leads to the formation of soot, which emits visible light.
2. Smoky Luminous Flame: This type of flame is characterized by a significant amount of black smoke and soot production. It is commonly observed in poorly adjusted or malfunctioning burners or engines. The excessive presence of unburned fuel in the flame results in incomplete combustion and the emission of dark smoke particles.
3. Orange Luminous Flame: An orange flame indicates a higher combustion temperature compared to a yellow flame. It is often seen in more efficient burners or when burning fuels with a higher carbon content, such as oil or diesel. The higher temperature helps in burning more of the carbon particles, reducing the amount of soot and making the flame appear less yellow.
4. Blue Luminous Flame: A blue flame is typically associated with complete combustion. It indicates efficient burning of fuel, resulting in minimal soot formation. Blue flames are commonly observed in gas burners or Bunsen burners. The blue color is a result of the combustion of gases, such as methane, in the presence of sufficient oxygen.
It's important to note that the luminosity of a flame can vary depending on factors such as fuel-air mixture, combustion temperature, and the presence of impurities. Achieving complete combustion and minimizing the production of soot is desirable for efficient and cleaner burning processes.
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Tell us your feelings about the pollution of our waterways with these drugs when they are flushed down the sinks either accidentally or on purpose
Answers
I am quite concerned about the pharmaceuticals being mistakenly or purposefully flushed down drains polluting our rivers.
It is a significant issue that is harmful to the environment, animals, and public health. Drug contamination may cause major health issues for people, animals, and plants by contaminating the water, soil, and even the air.
Fish and other aquatic creatures can also absorb the medications, which can cause mutations, malformations, and even death. To safeguard the health of all living things and our environment, this is a problem that has to be addressed.
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How many moles of FeCl3 can
ba produced from
2.79.mol Cl?
2 Fe + 8 Clg -+ 2 FeCls
Answers
Answer:
2.79mol of FeCl3
solving:
formula to find given mol to b mol:
given a mol * b mol in reaction / a mol in reaction = answer
solving:
2.79mol * 2mol FeCl / 2mol Cl = 2.79mol FeCl3
What is the symbol for the element that has 12 protons,14 neutrons, and 12 electrons
Answers
Answer:
mg
Explanation:
what volume litters of oxygen would be ptoduced in the electrolysis which forms 548 litters of hydrogen both gases measured at stp?
Answers
The ideal gas law may be used to determine the volume of oxygen created in the electrolysis that produces 548 litres of hydrogen at STP (Standard Temperature and Pressure). PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature, according to the ideal gas equation.
The pressure is 1 atm, the temperature is 273 K, and the number of moles of hydrogen is 548/22.4 = 24.5 in this example. We may compute the volume of oxygen created by rearranging the ideal gas law: V = nRT/P = 24.5*0.082*273/1 = 483.3 litres.
As a result, the volume of oxygen created in the electrolysis at STP that produces 548 litres of hydrogen is 483.3 litres.
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baking soda, sodium hydrogen carbonate decomposes fully to produce 42.5 of sodium oxide, carbon dioxide gas and water.
write the balance equation for this reaction indicate State symbols
Answers
A paleontologist unearths the remains of a Tyrannosaurus rex. We know that these dinosaurs became
extinct about 65 million years ago. Therefore, would it be reasonable to expect that the Carbon-14 in the
fossil has completed 15,000 half-lives? Why or why not?
Answers
Given that the T. rex was extinct 65 million years ago, this period of time is comparably brief, and we do not anticipate the carbon-14 in the fossil to have gone through 15,000 half-lives.
How long does it usually take for a drug to be entirely removed from the body, measured in half-lives?To reduce a drug's concentration by 95% to 97%, it takes four to five half-lives. the time frame of the drug's activity. The longer the half-life of the medicine, the longer its plasma concentration will remain above the minimum effective concentration.
The formula t = (t1/2) x (log N0/Nt) can be used to compute the amount of time needed for 15,000 half-lives to occur.
We can estimate the amount of time needed for 15,000 half-lives to occur as follows:
t = (5,700 years) x (log 1/1x10⁻¹²)
t ≈ 82,000 years
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You are asked to measure out approximately 10 mL of a salt solution.How would you measure this volume out if the solution comes in a bottle and you onlyhave a teaspoon?How would you measure this volume out if the solution comes in a drop bottle and youhave no other measuring devices?1 mL contains approximately 20 drops (1 mL = 20 drops).
Answers
1) List known values
1mL = 20 drops
1 teaspoon = 4.93 mL
List unknown values
Number of teaspoons to get 10mL of solution.
Process
1. Count 80 drops of solution in the teaspoon. (4mL)
2. Pour the teaspoon into a flask.
3. Repeat step 1 one more time and pour into the flask. (4mL)
4. Count 40 drops of solution in the teaspoon and pour into the flask. (2mL)
The flask contains 4mL+4mL+2mL = 10mL
help me please pleasee pleaseee Ó╭╮Ò
Answers
The activity that occurred in my house is the melting of ice whose particles were arranged in an orderly fixed pattern but which became disordered when the ice melted.
What happens before and after the melting of a solid?Before melting, a solid is in a fixed shape and volume. The particles in a solid are closely packed together and have a fixed position in the lattice structure. They vibrate in their fixed positions but are not able to move around freely. The arrangement of particles in a solid is typically orderly and has a definite pattern.
When a solid is heated and reaches its melting point, it begins to absorb energy and the particles start to vibrate more vigorously. Eventually, the particles gain enough energy to overcome the attractive forces between them, and the solid begins to melt. During melting, the particles start to move around more freely and the solid structure starts to break down to form liquid.
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Complete question:
Activity A
Go around your house and observe the activities of your family. Copy the table below on a separate sheet of paper to list the activities you observed and identify the phase change/s in each activity. Then, explain your answers.
Activity
Phase Change
Explanation
Activity B
What happens to particles of matter before and after a phase change? For this activity, your task is to illustrate the the arrangement and motion of particles in a matter before and after melting, freezing, evaporation, condensation, sublimation, and deposition. Be creative in your illustrations. Submit a copy of your output to your teacher for checking.
2. What are the main conditions of the reaction
Answers
Answer:The concentration of the reactants. The more concentrated the faster the rate.
Temperature.
Physical state of reactants.
The presence (and concentration/physical form) of a catalyst (or inhibitor)
Light.
what is the percent by mass of nitrogen in the following fertilizers? NH3
Answers
The percent by mass of nitrogen in ammonia (NH3) is approximately 82.15%
Calculating the mass of nitrogen to the total mass of the compound and then expressing the result as a percentage will allow us to determine the percent by mass of nitrogen in NH3 (ammonia).
Ammonia's molecular structure, NH3, indicates that it is made up of one nitrogen atom (N) and three hydrogen atoms (H). We must take both the molar masses of nitrogen and ammonia into account when calculating the percent by mass of nitrogen.
Nitrogen's (N) molar mass is roughly 14.01 g/mol. The molar masses of nitrogen and hydrogen are added to determine the molar mass of ammonia (NH3). Since hydrogen's molar mass is around 1.01 g/mol, ammonia's molar mass is:
(3 mol H 1.01 g/mol) + (1 mol N 14.01 g/mol) = 17.03 g/mol = NH3.
Now, we can use the following formula to get the nitrogen content of ammonia in percent by mass:
(Mass of nitrogen / Mass of ammonia) / 100% is the percentage of nitrogen by mass.
Ammonia weighs 17.03 g/mol and contains 14.01 g/mol of nitrogen by mass. By entering these values, we obtain:
(14.01 g/mol / 17.03 g/mol) 100% 82.15 % of nitrogen by mass
Ammonia (NH3) has a nitrogen content that is roughly 82.15 percent by mass.
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What volume of CO2(g), measured at STP is produced if 15.2 grams of CaCO(s) is heated?
Answers
Answer:
Volume = 3.4 L
Explanation:
In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:
CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)
Now, let's calculate the number of moles in 15.2 g CaCO₃:
mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)
= \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)
= 0.1518 moles
From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.
Hence, from the formula for the number of moles of a gas, we can calculate the volume of CO₂:
mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)
⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)
⇒ Volume = 0.1518 × 22.4
= 3.4 L
Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.
When any and HCl are mixed in equal molar quantities the result is?
Answers
The result is a neutralization reaction, forming water (H2O) and table salt (NaCl).
Salt and water are produced when equal amounts of sodium hydroxide (strong base) and hydrochloric acid (strong acid) solution are combined. It's a neutralization reaction right now. The pH of the resultant solution, created by the neutralization of hydrochloric acid and sodium hydroxide, is 7. Salt is created when sodium hydroxide and hydrochloric acid are combined with water. A typical acid-base reaction is this one. Salt and water are created when the acid and base react. Here, sodium hydroxide, a powerful base, and hydrochloric acid, a powerful acid, are the reactants. We all know that a strong acid and a strong base combine in an equal amount to create salt and water in a neutralization process.
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complete question: When NaOH and HCl are mixed in equal molar quantities the result is?
What Is The Name For CH3(CH2)4CH3
Answers
Answer:
hexane
I hope it's helps you
Using the formula for the ideal gas law and the value for the gas law constant of 0.08206 L.atm/K/mol, what is the volume (in L) of 9.84 grams of dry hydrogen at 23.4 degrees C and 757 torr?
Answers
PV=NRT
P=755torr
V=?
n=Mass/Molarmass…… mass=9.84g molarmass=1g/mol
R=0.8206L.atm/K/mol
T=23.4 degrees C so to kelvin that would be 23.4+273K=296.4K
Changing 757torr to atm:
760torr=1atm
757totr=X
Sooo X=757torrx1atm/760torr
X=757x1atm/760
X=757atm/760
X=0.996atm
Then we use our ideal gas equation which is:
PV=nRT
0.996atmxV=9.84molX0.8206X296.4K
V=9.84molX0.8206L.atm/K/molX296.4K/0.996atm
V=9.84X0.8206LX296.4/0.996
V=2,393.3L/0.996=2,402.9L approximately 4significant figure=2,403L
Which illustration is a closed circuit? * + A B
Answers
Answer:
I believe its B for sure
Hope this helps!
Explanation:
Which of the following technique is used to purify the impurities that are not very different in chemical properties of element? [a] Gas chromatography [b] Column chromatography [c] TLC [d] HPLC
Answers
Answer:
Explanation: Liquid Chromatography
I'm sorry if i'm wrong
(NH4) (OH) is compound soluble or insoluble?
Answers
An inorganic fungicide, microbiocide, and herbicide is ammonium hydroxide. It is very soluble in water and non-volatile.
In Ammonium hydroxide Ammonium Chloride, which hydroxide is insoluble?Because of its extremely high solubility product, magnesium hydroxide, also known as Magnesium hydroxide, is insoluble in Ammonium hydroxide. Nevertheless, when Ammonium Chloride is present, the following reaction occurs, and the magnesium hydroxide dissolves.
Why does water include Ammonium hydroxide?Ammonia is dissolved in water to form ammonium hydroxide (Ammonium hydroxide). The substance, also known as ammonia or ammonia water, is used as a cleaner and in the production of plastics, rubber, fertiliser, and textiles. It is a clear, colourless liquid with a strong to barely detectable ammonia odour.
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What are the basic building blocks of matter?AtomsCellsProtonsMolecules
Answers
Atoms are the basic building blocks of ordinary matter. Atoms can join together to form molecules, which in turn form most of the objects around you.
Therefore, the correct answer is atoms.
If you start with 10 carbon and 3 Hydrogen, what will you end with?
Answers
Hydrocarbons are composed of hydrogen and carbon only and the hydrocarbon produced will differ according to their mole ratio.
What are hydrocarbons?Hydrocarbons are compounds composed only of carbon and hydrogen.
Hydrocarbons are very large families of compounds which have a common property of being combustible.
Hydrocarbons include:
alkanesalkenes and alkynesThe mole ratio of the carbon to hydrogen in each type of hydrocarbon differs.
Therefore, starting with 10 carbon and 3 Hydrogen, the hydrocarbon produced will differ according to their mole ratio.
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meg goes swimming on a hot afternoon. When she comes out the pool her foot senses that the pavement is unbearably hot. Suppose meg wants to apply the scientific method to discover reasons for the hot pavement. What is the next step she should take?
A. Analyze the data
B. Ask questions
C. communicate the results
D. Make observations
Answers
The next step Meg should take in applying the scientific method to discover the reasons for the hot pavement is B. Ask questions. Option B
Asking questions is a crucial step in the scientific method because it allows for the formulation of a hypothesis and the design of experiments to test that hypothesis. By asking questions, Meg can begin to explore the possible factors contributing to the hot pavement and formulate hypotheses to explain the phenomenon.
In this case, Meg can ask questions such as:
Why is the pavement so hot?
Does the pavement always feel hot after swimming?
Is the temperature of the pavement affected by the weather conditions?
Are there specific materials or colors used in the pavement that may contribute to its heat absorption?
These questions will help guide Meg in her investigation and provide a starting point for gathering more information and designing experiments to test her hypotheses.
Once Meg has formulated her questions, she can move on to the next steps of the scientific method, which include making observations, analyzing data, conducting experiments, and communicating the results.
These subsequent steps will allow her to gather data, analyze it, and draw conclusions based on evidence, leading to a better understanding of the factors contributing to the hot pavement. Meg can then communicate her findings to others, furthering scientific knowledge and potentially finding solutions to mitigate the problem.
Option B
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