1 At what temperature (in Celcius) does a gas occupy 65.0 mL if the gas occupies 95.0 mL at 145 oC? 2 How many grams of Cl2 occupies 2.24 L at 273K and 1.00 atm?

A compound which is 39.9 % C, 13.5 % H, and 46.6 % N by mass was studied.  A 0.378 g sample of the gas occupies 275 mL at 250.oC and 745 mm Hg.  What is the molar mass of the gas?  What is the empirical formula?  What is the molecular formula?

What volume (in L) will a 32 g sample of butane gas, C4H10(g), occupy at a temperature of 45.0 oC and a pressure of 728 mm Hg?

At what temperature will 5.00 g of Cl2 exert pressure of 1.184 atm at a volume of 750.0 mL?

11. (a) In a 20.0 L steel container, we have only 77.7 g of CO2(g), 66.6 g of N2(g), and O2(g). The temperature is 25.0 ◦C and the total pressure is 8.88 atm. What mass of O2(g) do we have, and what is its partial pressure? The molar masses of C, N, and O are 12.01, 14.01, and 16.00 g/mol. (b)  The density of a sample of pure CH4(g) at a constant pressure of 1.00 atm is 0.666 g/L. What is the average speed, or root mean square speed, of the CH4(g) molecules in this sample? The molar masses of C and H are 12.01 and 1.01 g/mol.

A mixture of gases contains 4.0 moles of Xe and 8.0 moles of Ar. If the total pressure of the mixture is 600 mmHg, what is the partial pressure os Ar in the mixture?

How many grams of nitric oxide gas is there at 126 °C, if it occupies 897.1 mL at 2.4 atm? (MMNO = 30.01 g/mol)

An unknown gas at 79.1 ∘C and 1.10 atm has a molar mass of 16.04 g/mol. Assuming ideal behavior, what is the density of the gas? density:                                                g/L

The gas of a certain volcano had the following composition in mole percent: 60.0% CO2, 28.0% H2, 7.40% HCl, 1.80% HF, 2.70% SO2, and 0.100% H2S.  What would be the partial pressure of  HF in atmospheres if the total pressure was 285 mmHg? 1atm = 760mmHg