How do you calculate with a menecular weight in gas equations

Answer 1

To calculate using the molecular weight in gas equations, you can use the ideal gas law equation:

PV = nRT

Where:
P = pressure (in atm)
V = volume (in liters)
n = moles of gas
R = ideal gas constant (0.0821 L.atm/mol.K)
T = temperature (in Kelvin)

To incorporate the molecular weight of the gas into the equation, you can calculate the moles of gas using the molecular weight (MW) of the gas and the mass of the gas (m):

n = m / MW

Substitute this expression for n into the ideal gas law equation to get:

PV = (m / MW)RT

From this equation, you can solve for any of the variables (P, V, T, or m) given the values of the other variables.