Chemistry
posted by Anonymous .
What is the pressure, in torr, of a gas whose density is 8.0 g/L at a temperature of 25 C above standard temperature and whose molecular weight is 75 g/mol?

Use the gas law and solve for the pressure:
PV=nRT
Where
n=moles of gas
L=volume
R=62.3637 L·Torr/mol·K
and
T=273.15K + 25 C=298.15K
The density of the gas is 8.0g/L and the molecular weight of the gas is 75 g/mol
8.0g//75g/mol= x mol/L
Rearrangement of the gas law gives the following:
P=(n/V)*RT
Plug in x mol/L into the equation and plug and chug. 
**Fixed a typo that probably would cause confusion.
Use the gas law and solve for the pressure:
PV=nRT
Where
n=moles of gas
L=volume
R=62.3637 L·Torr/mol·K
and
T=273.15K + 25 C=298.15K
The density of the gas is 8.0g/L and the molecular weight of the gas is 75 g/mol
8.0g/L**/75g/mol= x mol/L
***This leaves mol/L
Rearrangement of the gas law gives the following:
P=(n/V)*RT
Plug in x mol/L into the equation and plug and chug.
Respond to this Question
Similar Questions

chemistry
one mole of a gas occupies 27.0 liters, and its density is 1.41g/l at a particular temperature and pressure. what is its molecular weight? 
Chemistry
1. A cylinder of Xenon has a volume of 750. ml. At 25.0°C the cylinder has a pressure of 655 torr. How much Argon is present in the cylinder? 
chemistry homework help!!
many gases are shipped in high pressure containers. consider a steel tank whose volume is 42.0L and which contains O2 gas at a pressure of 165atm at 23 degrees celsius. 1.) what mass of O2 does the tank contain? 
Chemistry
It is found that an unknown gas has a density of 2.5 times that of Oxygen gas of the same Temperature and Pressure. What is its molecular weight? 
chem
At what temperature will a 1.0 g sample of neon gas exert a pressure of 500 torr in a 5.0 L container ? 
Chemistry
An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30.°C and a pressure of 710. torr. The gas is then compressed to a volume of 38 mL, and the temperature is raised to 827°C. What is the new pressure … 
AP Chemistry
The rate of effusion of unknown gas X is found to be about 1.5 times that of SF6 gas (MW=146 g/mol) at the same conditions of temperature and pressure. What is the molecular weight of gas X? 
Chemistry
For a gas sample whose total pressure is 740 torr, what are the partial pressures if the moles of gas present are 1.3 mol N2, 0.33 mol O2, and 0.061 mol Ar? 
Chemistry
A student performed an experiment to determine the molecular weight of a gaseous compound. Using the ideal gas law PV = nRT, and knowing the pressure, temperature, and volume of the vapor, the student calculated the number of moles … 
Chemistry
A gas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight 40.0). If the partial pressure of argon is 200. torr, what is the pressure of methane, in torr?