A 10.00-L tank contains helium gas at 2.5 atm. What is the pressure of the gas in mmHg? O 304 mmHg O 250 mmHg O 760 mmHg O 1900 mmHg O 3800 mmHg

Determine the molar mass of unknown gas if a sample weighing 0.389 g is collected in a flask with a volume of 102 cm³ at 97°C. The pressure of the unknown gas is 728 mmHg. O a. 187 g/mol O b. 112 g/mol O c. 121 g/mol O d. 31.6 g/mol O e. 8.28 X 103 g/mol ww

In a mixture of argon and hydrogen, occupying a volume of 1.54 L at 860.0 mmHg and 31.0 oC, the mass of the argon is 1.6 g. What is the partial pressure of argon?   41.3 mmHg   819 mmHg   491 mmHg   430 mmHg   369 mmH

A 784 mL sample of NH3 gas is at STP. If the volume changes to 581 mL and the temperature changes to 23 ºC, what will be the new pressure in atmospheres?

If a sample of gas occupies 14.3 mL in a balloon at a pressure of 1.25 atm, what volume will it occupy if the pressure is reduced to 0.83 atm with no change in temperature? 9.50mL O 9.50L O 22mL None of the listed choices are correct. O 21.5mL O 9.5mL

The volume of a test tube is 78 mL. The tube contains 62 mL of Nitrogen and 16 mL of Oxygen. The atmospheric pressure is 754 mmHG. What is the partial pressure of the Oxygen? What is the partial pressure of the Nitrogen?