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## MOLES AND GASES

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**Molar Volume**1 mole of any gas at (STP) standard temperature (0C)andpressure (1 atm) has a volume of 22.4 cubic decimeters (dm3), which is the same as 22.4 liters (L). This volume of gas is called a molar volume because it is the volume of 1 mole of a gas at standard conditions.**Moles Volume (L)**To calculate molar volume of a gas: (X) Moles22.4 L/mol = Molar volume (L) 1 mol**Volume (L) Moles**To calculate moles: (÷) Molar volume of gas 1 mol = Moles 22.4 L/mol**Sample A: VOLUME (L) MOLES (÷)**A room with a volume of 4000 L contains how many moles of air at STP?**Sample B: MOLES VOLUME (L) (X)**A chemical reaction produces 0.82 moles of oxygen gas. What volume will that gas occupy at STP?**PRACTICE PROBLEMS**1.) A container with a volume of 893 L contains how many moles of air at STP? (L mol)**2.) A chemical reaction produces 0.37 mol of N2gas. What**volume will that gas occupy at STP? (mol L)**Convert grams liters(g mol L)**6. 5.0g of H2