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Standard Temperature and Pressure Solutions Library

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Standard Temperature and Pressure

Q. Which of the following is not a standard state?a) for a solid, it is 1 atm b) for a solid, it is 25°C c) for a solution, it is 1 M d) for a liquid,...

Solved • Apr 27, 2020

Standard Temperature and Pressure

Q. What volume will 0.543 moles of He occupy at STP?(A) 41.3 L (B) 13.3 L (C) 12.2 L (D) 22.4 L (E) 1.11 L

Solved • Nov 29, 2019

Standard Temperature and Pressure

Q. At STP, what is the mass 13.0 L of methane, CH 4?a. 0.580 gb. 16.0 gc. 9.31 gd. 27.6 ge. 22.4 g

Solved • Aug 6, 2019

Standard Temperature and Pressure

Q. At STP, what is the volume of 4.50 moles of nitrogen gas?A) 167 LB) 3420 LC) 101 LD) 60.7 L

Solved • Aug 6, 2019

Standard Temperature and Pressure

Q. How many moles of neon occupy a volume of 14.3L at STP?

Solved • Aug 5, 2019

Standard Temperature and Pressure

Q. Standard temperature and pressure (STP), in the context of gases, refers to __________.a. 298.15 K and 1 atmb. 273.15 K and 1 atmc. 298.15 K and 1 ...

Solved • Aug 2, 2019

Standard Temperature and Pressure

Q. If 6.00 mol of an ideal gas at STP were confined to a cube, what would be the length in cm of an edge of this cube?

Solved • Oct 31, 2018

Standard Temperature and Pressure

Q. A 4.0-L vessel containing N2 at STP and a 2.0-L vessel containing H2 at STP are connected by a valve. If the valve is opened allowing the two gases...

Solved • Oct 31, 2018

Standard Temperature and Pressure

Q. What is the molar mass of an unknown hydrocarbon whose density is measured to be 1.97 g/L at STP?

Solved • Oct 31, 2018

Standard Temperature and Pressure

Q. An herbicide is found to contain only C, H, N, and Cl. The complete combustion of a 100.0-mg sample of the herbicide in excess oxygen produces 83.1...

Solved • Oct 31, 2018

Standard Temperature and Pressure

Q. An herbicide is found to contain only C, H, N, and Cl. The complete combustion of a 100.0-mg sample of the herbicide in excess oxygen produces 83.1...

Solved • Oct 31, 2018

Standard Temperature and Pressure

Q. An aerosol spray can with a volume of 250 mL contains 2.30 g of propane gas (C3H8) as a propellant.What volume would the propane occupy at STP?

Solved • Oct 31, 2018

Standard Temperature and Pressure

Q. If a reaction occurs in the gas phase at STP, we can determine the mass of a product from the volumes of reactants. Explain.

Solved • Oct 31, 2018

Standard Temperature and Pressure

Q. A gas sample at STP contains 1.26 g oxygen and 1.76 g nitrogen.What is the volume of the gas sample?

Solved • Oct 31, 2018

Standard Temperature and Pressure

Q. An organic compound contains C, H, N, and O. Combustion of 0.1023 g of the compound in excess oxygen yielded 0.2766 g CO2 and 0.0991 g H2O. A sampl...

Solved • Oct 18, 2018

Standard Temperature and Pressure

Q. At STP, 1.0 L Br2 reacts completely with 3.0 L F2, producing 2.0 L of a product. What is the formula of the product? (All substances are gases.)

Solved • Oct 18, 2018

Standard Temperature and Pressure

Q. Consider a 1.0-L container of neon gas at STP. Will the average kinetic energy, average velocity, and frequency of collisions of gas molecules with...

Solved • Oct 18, 2018

Standard Temperature and Pressure

Q. Consider a 1.0-L container of neon gas at STP. Will the average kinetic energy, average velocity, and frequency of collisions of gas molecules with...

Solved • Oct 18, 2018

Standard Temperature and Pressure

Q. An unknown diatomic gas has a density of 3.164 g/L at STP. What is the identity of the gas?

Solved • Oct 18, 2018

Standard Temperature and Pressure

Q. Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. This causes sodium az...

Solved • Oct 18, 2018

Standard Temperature and Pressure

Q. A student adds 4.00 g of dry ice (solid CO2) to an empty balloon. What will be the volume of the balloon at STP after all the dry ice sublimes (con...

Solved • Oct 17, 2018

Standard Temperature and Pressure

Q. Consider the following reaction:4Al(s) + 3O2(g) → 2Al2O3(s)It takes 2.00 L of pure oxygen gas at STP to react completely with a certain sample of a...

Solved • Oct 17, 2018

Standard Temperature and Pressure

Q. A 1-L sample of CO initially at STP is heated to 546 K, and its volume is increased to 2 L.(a) What effect do these changes have on the number of c...

Solved • Oct 17, 2018

Standard Temperature and Pressure

Q. Ethanol, C2H5OH, is produced industrially from ethylene, C2H4, by the following sequence of reactions:3C2H4 + 2 H2SO4 ⟶ C2H5HSO4 + (C2H5)2SO4 C2H5H...

Solved • Oct 17, 2018

Standard Temperature and Pressure

Q. Consider the following questions:(a) What is the total volume of the CO2(g) and H2O(g) at 600 °C and 0.888 atm produced by the combustion of 1.00 L...

Solved • Oct 17, 2018

Standard Temperature and Pressure

Q. What volume of O2 at STP is required to oxidize 8.0 L of NO at STP to NO2? What volume of NO2 is produced at STP?

Solved • Oct 17, 2018

Standard Temperature and Pressure

Q. A mixture of 0.200 g of H2, 1.00 g of N2, and 0.820 g of Ar is stored in a closed container at STP. Find the volume of the container, assuming that...

Solved • Oct 17, 2018

Standard Temperature and Pressure

Q. The density of a certain gaseous fluoride of phosphorus is 3.93 g/L at STP. Calculate the molar mass of this fluoride and determine its molecular f...

Solved • Oct 17, 2018

Standard Temperature and Pressure

Q. The effect of chlorofluorocarbons (such as CCl2F2) on the depletion of the ozone layer is well known. The use of substitutes, such as CH3CH2F(g), f...

Solved • Oct 17, 2018

Standard Temperature and Pressure

Q. Dilute aqueous hydrogen peroxide is used as a bleaching agent and for disinfecting surfaces and small cuts. Its concentration is sometimes given as...

Solved • Oct 16, 2018

Standard Temperature and Pressure

Q. When 35.6 L of ammonia and 40.5 L of oxygen gas at STP burn, nitrogen monoxide and water form. After the products return to STP, how many grams of ...

Solved • Oct 14, 2018

Standard Temperature and Pressure

Q. How many grams of phosphine (PH 3) can form when 37.5 g of phosphorus and 83.0 L of hydrogen gas react at STP?P4(s) + H2(g) ⟶ PH3(g)    [unbalanced]

Solved • Oct 14, 2018

Standard Temperature and Pressure

Q. How many grams of phosphorus react with 35.5 L of O 2 at STP to form tetraphosphorus decoxide?P4(s) + 5O2(g) ⟶P4O10(s)

Solved • Oct 14, 2018

Standard Temperature and Pressure

Q. How many moles of gaseous arsine (AsH 3) occupy 0.0400 L at STP? What is the density of gaseous arsine?

Solved • Oct 14, 2018

Standard Temperature and Pressure

Q. A sample of Freon-12 (CF2Cl2) occupies 25.5 L at 298 K and 153.3 kPa. Find its volume at STP.

Solved • Oct 14, 2018

Standard Temperature and Pressure

Q. When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced.2Al (s) + 6HCl (aq) → 2AlCl3 (aq) + 3H2 (g) What volume in L of...

Solved • Jul 24, 2018

Standard Temperature and Pressure

Q. Calculate the density of oxygen, O2, under each of the following conditions: STP1.00 atm and 35.0°C Express your answers numerically in grams per l...

Solved • Jun 19, 2018

Standard Temperature and Pressure

Q. A sample of carbon dioxide gas (CO2) has a volume of 2.5 L at standard temperature and pressure (STP). How many molecules of carbon dioxide gas are...

Solved • Jun 19, 2018

Standard Temperature and Pressure

Q. If the density of an ideal gas at STP if found to be 0.716 g/L, what is its molar mass? 

Solved • Jun 12, 2018

Standard Temperature and Pressure

Q. Be sure to answer all parts.How many moles of gaseous arsine (AsH3) occupy 0.273 L at STP? What is the density of gaseous arsine? 

Solved • May 30, 2018

Standard Temperature and Pressure

Q. Enter your answer in the provided box.A sample of Freon-12(CF2Cl2) occupies 10.0 L at 293 K and 128.00 kPa. Find its volume at STP. 

Solved • May 30, 2018

Standard Temperature and Pressure

Q. A sample of oxygen gas has a volume of 2.50 L at STP. How many grams of O2 are present? 

Solved • May 30, 2018

Standard Temperature and Pressure

Q. An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air. If the flask volume i...

Solved • May 27, 2018

Standard Temperature and Pressure

Q. A 2.45-L flexible flask at 15°C contains a mixture of N2, He, and Ne at partial pressures of 0.283 atm for N2, 0.151 atm for He, and 0.425 atm for ...

Solved • May 21, 2018

Standard Temperature and Pressure

Q. Calculate the volume occupied by 56.5 g of argon gas at STP. a) 22.4 L b) 31.7 L c) 34.6 L d) 1, 270 L e) 1, 380 L

Solved • May 15, 2018

Standard Temperature and Pressure

Q. Calculate the volume of 63.5 g of carbon monoxide at STP. Report your answer to one decimal place!

Solved • May 15, 2018

Standard Temperature and Pressure

Q. A gas has a density of 3.214 g/L at 728 torr and 24°C. What would be its density at STP?

Solved • Apr 3, 2018

Standard Temperature and Pressure

Q. The density of a gas is 1.43 g/L at STP. Calculate its density under a pressure of 743 torr and 26°C

Solved • Apr 3, 2018

Standard Temperature and Pressure

Q. Which of the following samples has the greatest density at STP?a. SO2b. Arc. SF6d. NOe. He

Solved • Mar 23, 2018

Standard Temperature and Pressure

Q. Find out the volume contained by 6.8 g of ammonia at STP. (N=14, H=1)

Solved • Mar 23, 2018

Standard Temperature and Pressure

Q. Arrange the following gases in order of decreasing density at STP. Rank from largest to smallest.F2O2Cl2Ne

Solved • Mar 22, 2018

Standard Temperature and Pressure

Q. Use the molar volume of a gas at STP to calculate the density (in g/L) of oxygen gas at STP.

Solved • Mar 22, 2018

Standard Temperature and Pressure

Q. Which gas sample has the greatest volume at STP?a. 20g of Neb. 2g of H2c. 8g of Hed. 20 g of N2

Solved • Mar 19, 2018

Standard Temperature and Pressure

Q. Which of the following gases has the largest density at STP?a. Heb. C2H2 c. F2d. N2e. H2

Solved • Mar 15, 2018

Standard Temperature and Pressure

Q. Which of the following samples will have the greatest volume at STP?a. 22 g Neb. 22 g Hec. 22 g O2d. 22 g Cl2 e. All have the same V at STP

Solved • Mar 15, 2018

Standard Temperature and Pressure

Q. When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. What volume of H2(g) is produced when 6.2g of Al(s) reacts at...

Solved • Mar 2, 2018

Standard Temperature and Pressure

Q. One mole of nitrogen and one mole of neon are combined in a closed container at STP.How big is the container?

Solved • Feb 26, 2018

Standard Temperature and Pressure

Q. Consider three 1-L flasks at STP. Flask A contains NH 3  gas, flask B contains NO2  gas, and flask C contains N2  gas. In which flask are the molec...

Solved • Oct 16, 2017

Standard Temperature and Pressure

Q. Methane, CH4(g), reacts with steam to give synthesis gas, a mixture of carbon monoxide and hydrogen. CH4 (g) + H2O(g) → CO(g) + H2(g) [unbalanced]...

Solved • Oct 16, 2017

Standard Temperature and Pressure

Q. Consider the following gas phase reaction:2NO(g) + O2(g) → 2NO2(g)400. mL of NO at STP is reacted with 500. mL of O2 at STP. Calculate the volume o...

Solved • Jul 26, 2017

Standard Temperature and Pressure

Q. What volume will 0.780 moles of Xe occupy at STP?

Solved • Jun 28, 2017

Standard Temperature and Pressure

Q. A sample of helium (He) occupies 4 liters at STP. What pressure is necessary to change the volume to 2 liters at 20°C? 1. 2.1464 atm 2. 2.0 atm ...

Solved • Jun 28, 2017

Standard Temperature and Pressure

Q. Standard conditions (STP) is defined as1. 273.15 K, 760 torr.2. 0 K, 250 atm.3. 100 K, 1 torr.4. 273.15 K, 250 torr.5. 0 K, 1 atm.

Solved • Jun 28, 2017

Standard Temperature and Pressure

Q. If 250 mL of a gas at STP weighs 2 g, what is the molar mass of the gas?A. 179 g • mol-1B. 8.00 g • mol-1C. 56.0 g • mol-1D. 28.0 g • mol-1E. 44.8 ...

Solved • Jun 23, 2017

Standard Temperature and Pressure

Q. A balloon filled with helium occupies 20.0 L at 1.50 atm and 25°C. How many moles of helium will there be in the balloon at STP?A. 22.4 molesB. 1.1...

Solved • Jun 23, 2017

Standard Temperature and Pressure

Q. What volume will 40.0 L of He at 50.00°C and 1201 torr occupy at STP?A. 26.7 LB. 18.6 LC. 12.8 LD. 53.4 LE. 31.1 L

Solved • Jun 23, 2017

Standard Temperature and Pressure

Q. Calculate the density of nitrogen gas at STP.A. 0.625 g/LB. 1.25 g/LC. 6.83 g/LD. 13.7 g/LE. Cannot be calculated with this information (undefined)

Solved • May 29, 2017

Standard Temperature and Pressure

Q. What is the volume occupied at STP by a mixture of 4.00 g of He(g), 2.00 g of H2(g) and 32.0 g of O2(g)? A. 6.15 L B. 11.2 L C. 22.4 L D. 44.8 ...

Solved • May 29, 2017

Standard Temperature and Pressure

Q. Consider the reaction between Mg(s) and HCl(aq) to produce aqueous magnesium chloride and hydrogen gas. What volume of hydrogen at STP will be prod...

Solved • May 29, 2017

Standard Temperature and Pressure

Q. For the combustion of sucrose, C12H22O11, shown below: a) How many moles of oxygen are required to react with 1.00g of sucrose? C12H22O11 + 12O2 → ...

Solved • Apr 25, 2017

Standard Temperature and Pressure

Q. If the density of a gas 1.43 g/L at STP, what is the molecular weight of the gas?

Solved • Feb 27, 2017

Standard Temperature and Pressure

Q. What volume will 3.12 grams of helium occupy at STP? 

Solved • Dec 27, 2016

Standard Temperature and Pressure

Q. Which of the following gases has the greatest density at STP?A) NO2 (molar mass = 46.01 g/mol)B) Xe (molar mass = 131.3 g/mol)C) SO2 (molar mass = ...

Solved • Oct 26, 2016

Standard Temperature and Pressure

Q. An ideal gas occupies 49.0 L at 994 torr and 41.0°C. What volume would it occupy at STP?  1. 0.0136 L 2. 73.7 L 3. 55.7 L  4. 58.7 L 5. 105 L...

Solved • Oct 18, 2016

Standard Temperature and Pressure

Q. The density of a gas is 1.96 g/L at STP. What would the mass of 2.00 moles of the gas be at STP?1. 87.8 g2. There is not enough information to solv...

Solved • Sep 20, 2016

Standard Temperature and Pressure

Q. The action of some commercial drain cleaners is based on the following reaction: 2 NaOH (s) + 2 Al (s) + 6 H2O (l) → 2 NaAl(OH)4 (s) + 3 H 2 (g) ...

Solved • Sep 19, 2016

Standard Temperature and Pressure

Q. Determine the volume of O2 (at STP) formed when 50.0 g of KClO 3 decomposes according to the following reaction. 2 KClO3 (s) → 2 KCl (s) + 3 O2 (g...

Solved • Sep 19, 2016

Standard Temperature and Pressure

Q. Using the graph below, determine the gas that has the lowest density at STP.A) AB) BC) CD) DE) All of the gases have the same density at STP.

Solved • Sep 19, 2016

Standard Temperature and Pressure

Q. A hypothetical rock was harvested from another planet. Trapped inside was a diatomic gas. A volume of 1.25 mL of the gas was extracted from the roc...

Solved • Sep 9, 2016

Standard Temperature and Pressure

Q. If sufficient acid is used to react completely with 21.0 grams of Mg Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)  what volume of hydrogen at STP would be ...

Solved • Sep 9, 2016

Standard Temperature and Pressure

Q. Hydrogen gas (a potential future fuel) can be formed by the reaction of methane with water according to the equation:  CH4(g) + H2O(g) → CO(g) + 3...

Solved • Jun 3, 2016

Standard Temperature and Pressure

Q. Lithium reacts with nitrogen gas according to the reaction: 6 Li(s) + N2(g) → 2 Li3N(s)What mass of lithium (in g) reacts completely with 58.5 mL o...

Solved • Jun 3, 2016

Standard Temperature and Pressure

Q. Automobile air bags inflate following a serious impact. The impact triggers the chemical reaction:  2 NaN3(s) →  2Na(s) + 3 N2(g) If an automobil...

Solved • Jun 3, 2016

Standard Temperature and Pressure

Q. Use the molar volume of a gas at STP to calculate the density (in g/L) of nitrogen gas at STP. 

Solved • Jun 3, 2016

Standard Temperature and Pressure

Q. Use the molar volume of a gas at STP to determine the volume (in L) occupied by 33.6 g of neon at STP. 

Solved • Jun 3, 2016

Standard Temperature and Pressure

Q. A 574cm3 volume of Na2CO3 solution was warmed with an excess of sulfuric acid until all action ceased. A 9.0 L volume of dry CO2 gas measured at ST...

Solved • Mar 10, 2016

Standard Temperature and Pressure

Q. A mixture of hydrogen and helium is 25.0% hydrogen by mass. What is the partial pressure of hydrogen (in atm) in the mixture at STP?a) 0.460b) 0.39...

Solved • Mar 7, 2016

Standard Temperature and Pressure

Q. Assuming ideal behavior, what is the density of argon gas at STP, in g/L?a) 0.0176 g/Lb) 0.0250 g/Lc) 1.63 g/Ld) 1.78 g/Le) 181. g/L

Solved • Mar 7, 2016

Standard Temperature and Pressure

Q. At STP what volume of N 2 will react completely with 22.2 L H 2 to produce NH3? N2(g) + 3H2 (g) → 2NH 3 (g)   a. 7.4 L b. 14.8 L c. 22.2 L d....

Solved • Feb 12, 2016

Standard Temperature and Pressure

Q. Determine the theoretical yield of K 2CO3 when 0.392 moles of KO 2 react with 29.0 L CO2 (at STP – 0°C, 1 atm). The molar mass of KO 2 = 71.10 g/mo...

Solved • Feb 12, 2016

Standard Temperature and Pressure

Q. Which gas sample has the greatest volume at STP? a. 5g Ar b. 5g Rn c. 5g Ne d. 5g Kr e. 5g Xe

Solved • Feb 12, 2016

Standard Temperature and Pressure

Q. A sample of N2 gas occupies a volume of 746 mL at STP. What volume would N 2 gas occupy at 155°C at a pressure of 368 torr?   1. 983 mL 2. 566 m...

Solved • Feb 12, 2016

Standard Temperature and Pressure

Q. What is the density of Xe gas at STP? Give your result in g/L.a. 0.00156b. 64.0c. 5.86d. 5.37e. 0.178

Solved • Feb 12, 2016

Standard Temperature and Pressure

Q. How many moles of O 2 (molar mass = 32.00 g/mol) are needed to react completely with 52.0 L of CH4(g) at STP to produce CO 2 and H2O? (molar mass (...

Solved • Feb 4, 2016

Standard Temperature and Pressure

Q. Which of the following gases has the highest density at STP?   A. sulfur trioxide, SO 3 B. carbon dioxide C. NO 2 D. argon E. nitrogen 

Solved • Feb 4, 2016