Unit Test — Unit test Answers

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

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

A sample of calcium oxide (CaO) has a mass of 2.80 g. The molar mass of CaO is 56.08 g/mol. How many moles of CaO does this sample contain?

Consider the balanced equation below. 2H2S + 3O2 2SO2 + 2H2OWhich option gives the correct mole ratios?

The balanced equation below shows the products that are formed when pentane (C5H12) is combusted. C5H12 + 8O2 5CO2 + 6H2OWhat is the mole ratio of oxygen to pentane?

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

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

The pressure of 1 mol of gas is decreased to 0.5 atm at 273 K. What happens to the molar volume of the gas under these conditions?

What is the molar mass of fluorine, F2?

If 6.00 g of carbon is burned completely, what volume of carbon dioxide gas is released at STP?

A sample of sodium hydroxide (NaOH) has a mass of 160.0 g. The molar mass of NaOH is 40.00 g/mol. How many moles of NaOH does this sample contain?

The volume of a gas is 0.450 L when its pressure is 1.00 atm. If the temperature of the gas does not change, what is the pressure when its volume is changed to 2.00 L?Use .

The equation below shows lithium reacting with nitrogen to produce lithium nitride.6Li + N2 2Li3NIf 12 mol of lithium were reacted with excess nitrogen gas, how many moles of lithium nitride would be produced?

Consider this reaction.What volume (in milliliters) of oxygen gas is required to react with 4.03 g of Mg at STP?

The following balanced equation shows the formation of ammonia.N2 + 3H2 2NH3How many moles of nitrogen are needed to completely convert 6.34 mol of hydrogen?

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?

Which best defines partial pressure in a mixture of gases?

How many moles of oxygen (O2) are present in 33.6 L of the gas at 1 atm and 0°C?

The incomplete table below shows a comparison of the different gas laws.NameVariablesConstantsEquationBoyle's law pressure, volume? Charles’s lawvolume, temperature??temperature, pressurevolume, moles of gas?pressure, temperature, volume?What is assumed to be constant when using the combined gas law?

The chemical equation below shows the combustion of propane (C3H8).C3H8 + 5O2 3CO2 + 4H2OThe molar mass of oxygen gas (O2) is 32.00 g/mol. The molar mass of C3H8 is 44.1 g/mol. What mass of O2, in grams, is required to completely react with 0.025 g C3H8?