What is the density of a sample of air average molar mass, Ask an Expert

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1. Consider a 2.00L sample of an ideal gas. If one increases the temperature from 200K to 300K and decreases the pressure from 720mmHg to 360mmHg, what will be the final volume?

2. What is the density of a sample of air (average molar mass is 28.8 g/mol) that has a pressure of 750torr and a temperature of 27 degrees C?

3. A 33.0 g sample of N2O(the 2 is small) is held in a 3.0 L container. What is the pressure if the temperature is 400K?

4. Consider a flask containing a mixture of helium and oxygen. The volume of the flask is 1.25 L, the temperature is 40.0 degrees C, and the total pressure is 705 torr. If the flask is known to contain 0.015 mol of He, how many moles of O2 are present?

5. How many liters of CO2, measured at STP, are produced when 10.0 kg octane undergoes complete combustion with sufficient oxygen? 2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O

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Category:- Chemistry
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