A 1.59 g sample of a silicon-fluorine compound is determined to be 26.99% silicon by mass at 27.0 oC, and a pressure of 1.50 atm in a 0.250 L container.  Calculate the molecular formula (SixFy) of the silicon-fluorine compound.

Calculate the mass of 6.2 L of CO2 at 300° K and a pressure of 758.0 mm Hg.

A 7.90 L container holds a mixture of two gases at 13 °C. The partial pressures of gas A and gas B, respectively, are 0.213 atm and 0.512 atm. If 0.190 mol of a third gas is added with no change in volume or temperature, what will the total pressure become?

A mixture of krypton and methane gases is maintained in a 6.32 L flask at a pressure of 3.01 atm and a temperature of 74 °C. If the gas mixture contains 32.6 grams of krypton, the number of grams of methane in the mixture is

A sample of nitrogen gas in a container with a volume of 2.3 L and a temperature of 32° C exerts a pressure of 4.7 atm.  Calculate the number of moles of the gas.

A student collects 122. mL of hydrogen gas at 23.8 °C. The pressure of the hydrogen gas was determined to be 0.978 atm. How many moles of hydrogen gas were collected?

Styrene oxide is a fairly simple aromatic organic compound that has a pleasant odor and is often used in the perfume industry. If 2.07 g of the compound is vaporized completely into a closed 1.04 L flask at 435 oC, the pressure in the flask is found to be 735 torr. Calculate the formula weight of styrene oxide.

A mixture of gases consists of helium at a partial pressure of 400. torr, neon at a partial pressure of 300. torr, and argon at a partial pressure of 200. torr. What is the total pressure of this mixture of gases?

A 1.85 g sample of an unknown gas at 47 C and 1.00 atm is stored in a 2.85 L flask. What is the density of the gas? density: g/L What is the molar mass of the gas? molar mass: g/mol

A mixture of oxygen and krypton gases, in a 7.91 L flask at 41 °C, contains 8.74 grams of oxygen and 7.22 grams of krypton. The partial pressure of krypton in the flask is atm and the total pressure in the flask is atm.