Stoichiometry and the Gas Laws - Test Test Answers

A sample of calcium oxide CaO has a mass of 2 point 8 0 g The molar mass of CaO is 56 point 0 8 g over mol How many moles of CaO does this sample contain?

The balanced equation shows the products that are formed when pentane open paren cap c sub 5 cap h sub 12 close paren is combusted. cap c sub 5 cap h sub 12 plus 8 cap o sub 2 rightarrow 5 CO sub 2 plus 6 cap h sub 2 cap o What is the mole ratio of oxygen to pentane?

If 6 point 0 0 g of carbon is burned completely, what volume of carbon dioxide gas is released at STP?

Consider the balanced equation. 2 cap h sub 2 cap s plus 3 cap o sub 2 rightarrow 2 SO sub 2 plus 2 cap h sub 2 cap o Which option gives the correct mole ratios?

The incomplete table below shows a comparison of the different gas laws. Name Variables Constants Equation Boyle's law pressure, volume ? cap p sub 1 cap v sub 1 is equal to cap p sub 2 cap v sub 2 Charles’s law volume, temperature ? the fraction with numerator cap v sub 1 and denominator cap t sub 1 is equal to the fraction with numerator cap v sub 2 and denominator cap t sub 2 ? temperature, pressure volume, moles of gas the fraction with numerator cap p sub 1 and denominator cap t sub 1 is equal to the fraction with numerator cap p sub 2 and denominator cap t sub 2 ? pressure, temperature, volume ? the fraction with numerator cap p sub 1 cap v sub 1 and denominator cap t sub 1 is equal to the fraction with numerator cap p sub 2 cap v sub 2 and denominator cap t sub 2 What is assumed to be constant when using the combined gas law?

Which statement can best be concluded from the ideal gas law?

The pressure of 1 mol of gas is decreased to 0 point 5 atm at 273 cap k What happens to the molar volume of the gas under these conditions?

Avogadro’s number was calculated by determining the number of atoms in

The gas in the piston is at constant temperature. A student increases the pressure on the piston from 2 atm to 3 atm. Expand Image Expand Image Which gas law would a student use to investigate this situation?

Mercury(II) oxide HgO decomposes to form mercury Hg and oxygen open paren cap o sub 2 close paren The balanced chemical equation is shown. 2 HgO rightarrow 2 Hg plus cap o sub 2 The molar mass of cap o sub 2 is 32 point 0 0 g over mol How many moles of HgO are needed to produce 250 point 0 g of cap o sub 2 ?

The equation shows lithium reacting with nitrogen to produce lithium nitride. 6 Li plus cap n sub 2 ce bond right arrow 2 Li sub 3 cap n If 12 mol of lithium were reacted with excess nitrogen gas, how many moles of lithium nitride would be produced?

A sample of sodium hydroxide NaOH has a mass of 160 point 0 g The molar mass of NaOH is 40 point 0 0 g over mol How many moles of NaOH does this sample contain?

Which must be the same when comparing 1 mol of oxygen gas, cap o sub 2 , with 1 mol of carbon monoxide gas, CO ?

If the pressure, volume, and temperature of a gas are known, which can most likely be found by using the ideal gas law?

How many moles of oxygen open paren cap o sub 2 close paren are present in 33 point 6 liters of the gas at 1 atm and 0 times degree C ?

Which describes the volume of 1 mol of gas at standard temperature and pressure?

The chemical equation shows the combustion of propane open paren cap c sub 3 cap h sub 8 close paren cap c sub 3 cap h sub 8 plus 5 cap o sub 2 rightarrow 3 CO sub 2 plus 4 cap h sub 2 cap o The molar mass of oxygen gas open paren cap o sub 2 close paren is 32 point 0 0 g over mol The molar mass of cap c sub 3 cap h sub 8 is 44 point 1 g over mol What mass of cap o sub 2 , in grams, is required to completely react with 0 point 0 2 5 g cap c sub 3 cap h sub 8 ?

If a gas is moved from a large container to a small container but its temperature and number of moles remain the same, what would happen to the pressure of the gas?

Copper metal Cu reacts with silver nitrate open paren AgNO sub 3 close paren in aqueous solution to form Ag and Cu open paren NO sub 3 close paren sub 2 The balanced chemical equation is shown. Cu plus 2 AgNO sub 3 rightarrow Cu open paren NO sub 3 close paren sub 2 plus 2 Ag The molar mass of Cu is 63 point 5 g over mol The molar mass of Ag is 107 point 9 g over mol What mass, in grams, of Ag is produced from a reaction of 31 point 7 5 g of Cu ?

Which best defines partial pressure in a mixture of gases?

Which statement best describes a mole?

What is the molar mass of fluorine, cap f sub 2 ?

The balanced equation shows the formation of ammonia. cap n sub 2 plus 3 cap h sub 2 rightarrow 2 NH sub 3 How many moles of nitrogen are needed to completely convert 6 point 3 4 mol of hydrogen?

Consider this reaction. 2 Mg s plus cap o sub 2 times g rightarrow 2 MgO s What volume (in milliliters) of oxygen gas is required to react with 4 point 0 3 g of Mg at STP?

The volume of a gas is 0 point 4 5 0 L when its pressure is 1 point 0 0 atm. If the temperature of the gas does not change, what is the pressure when its volume is changed to 2 point 0 0 L? Use cap p sub 1 cap v sub 1 is equal to cap p sub 2 cap v sub 2