Gaseous and liquid states Questions and Answers

Isopropanol (C₃H₈O) is a key ingredient in some hand sanitizers. Suppose that 127 grams of isopropanol is dissolved in water. The volume of the solution is 1.250 milliliters. What is the molarity of the solution? Refer to the periodic table to help you answer. Express your answer to three significant figures. The molarity of the solution is ▭ M.

What will be the final pressure of a sample of nitrogen with a volume of 905 cm³ at 820 torr and 25.0°C if it is heated to 60.0 °C and given a final volume of 1130 cm³?

A sample of carbon dioxide has a volume of 28 mL at 28 °C and 629 torr. How many grams of CO₂ are in the sample?

Calculate the osmotic pressure of a solution containing 23.1 g of glycerin (C3H8O₂) in 261.0 mL of solution at 290 K. Express your answer in atmospheres to three significant figures.

Carbon monoxide can react with oxygen gas to form carbon dioxide; represented by the following equation 2 CO(g) + O₂(g) – 2 CO₂(g). How many liters of oxygen are required to react with 5.13 L carbon monoxide? (Recall that ANY gas requires 22.4L of space. Round answers to 2 decimals and NO UNITS!)

A sealed glass container contains 1.33 moles of He gas and 2.59 moles of Ar gas. If the total pressure inside the container is 0.858 atm what is the partial pressure of He in the glass container?

Chlorine is sold in pressurized lecture bottles containing 1.00 lb of chlorine. At a pressure of 14.7 psi and a temperature of 25 °C, how many liters of chlorine gas can be obtained from the bottle? 156 L 21.2 L 312 L 10.6 L

A 20.0 L gas cylinder has been filled with 4.60 moles of gas. You measure the pressure to be 4.20 atm. What is the temperature inside the tank? Express your answer to three significant figures and include the appropriate units.

At a certain temperature, a 19.0-L container holds four gases in equilibrium. Their masses are 3.5 g SO3, 4.6 g SO₂, 16.4 g N, and 0.98 g N₂O. What is the value of the equilibrium constant at this temperature for the reaction of SO2 with N₂O to form SO3 and N₂? Make sure you balance the reaction using the lowest whole-number coefficients. Kc=

A gas storage cylinder in an ordinary chemical laboratory measures 3.4 cm wide and 14. cm high, This is the label on it. CONTENT: N2 gas PRESSURE: 29.7 atm If the cylinder is opened and the gas allowed to escape into a large empty plastic bag, what will be the final volume of nitrogen gas, including what's collected in the plastic bag and what's left over in the cylinder? Write your answer in liters. Be sure your answer has the correct number of significant digits.

A gas has a volume of 3.83 L at 31.96 °C. What will the volume (in L) of the gas be if its temperature is raised to 81.83 °C while its pressure is kept constant?

For many purposes, we can treat nitrogen (N₂) as an ideal gas at temperatures above its boiling point of -196. ⁰C: Suppose the temperature of a sample nitrogen gas is raised from - 56.0 ⁰C to - 23.0 °C, and at the same time the pressure is decreased by 15.0%. Does the volume of the sample increase, decrease, or stay the same? 1. increases 2. decreases 3. stay the same If you said the volume increases or decreases, calculate the percentage change in the volume. Round your answer to the nearest percent

Does heating a solution cause a dissolved gas to be more or less soluble? Gas + solvent ⇆ saturated solution (△Hsoln < 0) The reaction is almost always exothermic when a gas dissolves in a liquid. Increasing the temperature shifts the equilibrium to the left. (A) more (B) less

A 3.600 L sample of neon gas contains 0.5500 moles of gas. How many moles of neon gas would need to be present to bring the final volume to 9.50L? Enter your answer in moles to two decimal places, do not include units.

At constant P, n and V are doubled, causing the temperature to (A) decrease (B) increase (C) remain unchanged

At constant V, n is doubled and P is reduced by half, causing the temperature to 1)increase 2)remain unchanged 3)decrease

A sample of oxygen gas in a closed system has a volume of 200 milliliters at 600K. If the pressure is held constant and the temperature is lowered to 300 K, what will be the new volume of the gas? 100 mL 300 mL 200 mL 400 mL

In the Using the Ideal Gas Law experiment, the temperature of the gas evolved is equal to the temperature of the water in the beaker, which ideally should be the same as the air temperature. Explain how the volume of oxygen evolved would change if you used ice water instead of room temperature water. How would it change if you used boiling water?

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 only have a teaspoon? How would you measure this volume out if the solution comes in a drop bottle and you have no other measuring devices? 1 mL contains approximately 20 drops.

A container of oxygen has a volume of 670 mL at a temperature of 50 "C. What volume will the gas occupy at 100 °C? V1 T1 = V₂ T2 832 mL 774 mL 647 mL 921 mL

175.0 liters of a gas in a flexible-walled container are prepared at 770.0 mmHg and 226.0 °C. The gas is placed into a tank under high pressure. When the tank cools to 18.0 °C, the pressure of the gas is 29.0 atm. What is the volume of the gas?

A sample of gas at 1.0 atm is expanded at a constant temperature from 20 L to 40 L. The final pressure is atm. P₁V₁ = P₂V₂ 0.83 0 0.50 0.75 0.67

A 8.0 L sample at 25 °C and 1.00 atm of pressure contains 0.5 moles of a gas. If an additional 0.75 moles of gas at the same pressure and temperature are added, what is the final total volume of the gas? a. 20 L b. 20 ml c. 30 L d. 25.5 L

A gas has a volume of 100.0 mL at a pressure of 600.0 mmHg. If the temperature is held constant, what is the volume of the gas at a pressure of 700.00 mmHg? 133.0 mmHg 116.7 mmHg 85.71 mmHg 75.00 mmHg

If the pressure of a certain gas is at 5.5 atm with a temperature of 300 K and volume of 2.5 Liters - what would be the NEW pressure if the NEW temperature was 350 K and the volume changed to 2 Liters?

A 220.0-mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275 K. The piston is pushed in until the sample has a volume of 95.0 mL. The new temperature of the gas is 244. K. What is the new pressure of the sample? 51.1 kPa 243 kPa 274 kPa

0.820 mole of hydrogen gas has a volume of 2.00 L at a certain temperature and pressure. What is the volume of 0.125 mol of this gas at the same temperature and pressure? 0.0512 L 0.250 L 0.305 L 4.01 L

What volume of carbon dioxide (in L) will 2.82 g of antacid made of calcium carbonate produce at 37.0 °C and 1.00 atm in the stomach according to the following reaction? CaCO3 (s) + 2 HCI (aq) → CaCl₂ (aq) + H₂O (1) + CO₂ (g)

How many L of gas are occupied by 15.36 moles at a pressure of 1.32 atm and a temperature of 204.95 Kelvin? The value of R is 0.0821 L atm/mol K. Do not include units in your answer. Round to the tenths place or further.

What quantity of gas, in moles, is contained in 5.99 L at STP? Do not include units in your answer. Round to the tenths place or further.

Initially, a gas has a pressure of 12.0 atm, a volume of 23.0 L and a temperature of 299K. The pressure and temperature are raised to 14.0 atm and 399K. What is the new volume of the gas?

A sample of Neon gas of mass 0.0615 moles occupies a volume of 0.639 L at 27oC and 1.00 atm pressure. Calculate the value of a gas constant, R. A. 0.385 atm. L/mol. K B. 0.0346 atm. L/mol.K C. 346 atm. L/mol. K D. none of the above.

What law will you use to solve the following problem? How many moles of gas does it take to occupy 120 liters at a pressure of 2.3 atm and a temperature of 340K? * Charle's Law Boyle's Law Gay-Lussac's Law Ideal Gas Law Dalton's Law of Partial Pressures

If a hairspray can is heated, what can be expected of the pressure of the gas inside the car The pressure will remain constant b The pressure will equalize C The pressure will increase d The pressure will decrease

If the volume of a confined gas is doubled while the pressure remains constant, what change (if any) would be observed in the temperature? It would be half as large It would double It would be four times as large It would remain the same

A helium-filled balloon has a volume of 6.27 L at 25°C and 0.51 atm. What volume will it have at 1.33 atm and 10.0°C? Do not include units in your answer. Round to the tenths place or further.

Oxygen and Chlorine gas are mixed in a container that has a total pressure of 1.17 atm. What is the partial pressure of the Chlorine gas (in atm) if Oxygen's partial pressure is 280 mmHg? Round your answer to two decimal places.

The average kinetic energy of N₂ molecules is 5.6 x 10-20 J. Pick the correct statement below. N₂ has greater kinetic energy than H₂. N₂ has less kinetic energy than H₂. N₂ and H₂ has the same kinetic energy.

A plastic container can withhold a total pressure of 240 kPa before exploding. It already contains 50 kPa of gas A and 130 kPa of gas B. What is the maximum partial pressure of gas C that the container can hold without exploding?

A scuba diver takes a capped plastic 2L bottle, filled with air on a dive. The pressure is 101.3 kPa at the surface. At the greatest depth of his dive, the bottle has collapsed and is only containing 1.25L of air. To what pressure did the diver ascend to?

The number of grams of water needed to dissolve 8.80 g of urea (NH2)2C(Molar Mass = 60.06) in order to prepare a 4.20 molal solution of urea is a. 0.615 g b. 78.9 g c. 35.9 g d. 0.0349 g e. None of the other answers are correct

When 0.6000 g of a substance are dissolved in enough water to make 100.0 mL of a solution, the osmotic pressure is found to be 1.263 atm. What is the molar mass of solute if the temperature was 313.15 K? Recall R-8.314 J/K mol)=0.0821 L atm/(K mol). a. 244.2 g/mol b. none of the other answers are correct c. 62.58 g/mol d. 122.1 g/mol e. 12.21 g/mol

The three states of matter are solid, liquid, and gas. To change from one state to another, energy is either added to or removed from the system. In this investigation, you will look at heating up water. Does that involve adding or removing energy? Explain.

Use your understanding of chemistry to complete the gas laws test. You may use your calculator and or periodic table on this assessment Your test grade in Skyward will be the HIGHEST of your 2 attempts 25% of your grade is from including a picture showing your work for any math you do. Make sure to number the question and include all of the steps you took to complete the math based questions. The image MUST be readable for credit. Inside a car that was at 0°C and 1.0 atm, a 1.43 L bottle warms up to 104 C. If the volume of the bottle remains constant, what is the pressure, in atm, inside the hot water bottle? "Include two decimal places in your answer. DO NOT include units"

Select the BEST answer from the choices below. In relation to gases, as pressure goes up, what is the effect on temperature and volume? Both temperature and volume go down Both temperature and volume go up Both temperature and volume stay the same Temperature goes up and volume goes down

Use the densities and balanced equation provided to answer the questions that follow. (density of C5H12 = 0.620 g/mL; density of C5Hg 0.681 g/mL; density of H₂ = 0.0899 g/L) C5H12(1) → C5Hg(1) + 2H₂(g) How many milliliters of C5Hgcan be made from 4860 mL C5H12? 5 points How many milliliters of C5H12 are needed to make 190.3 mL C5Hg? 5 points C. BONUS 3 points How many milliliters of H₂ can be made from 2.37 x 10³ mL C5H12

2.5 moles of helium are contained in a balloon at 30°C and 400 mm Hg of pressure. What is the volume of the balloon in liters? Report your answer to the hundredths place and don't forget to include units!

A gas tank contains helium, oxygen, and argon gas. If the partial pressure of both helium is 200 torr, the partial pressure of oxygen is 430 torr, and the partial pressure of argon is 300 torr, what is the total pressure of the gas tank? Don't forget to include units in your answer.

A sample of gaseous arsine (AsH3) in a 513 mL flask at 311 Torr and 203 K, is heated to 417 K, at which temperature arsine decom- poses to solid arsenic and hydrogen gas. The flask is then cooled to 253 K, at which tem- perature the pressure in the flask is 539 Torr. What percentage of arsine molecules have de- composed? Answer in units of %.

Select the BEST answer from the choices below. is the amount of energy needed to raise the temperature of one gram of a substance by 1°C. Specific heat capacity Kinetic energy Thermal equilibrium A redox reaction