# Determining the Mass of a Substance

1) What mass of oxgen gas will occupy 450.mL at 145mmHg and 62.5 degrees Celcius?

2) Find the volume in liters of 52.0g of CO2 at 410mmHg and 99.0 degrees Celcius.

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#### Solution Preview

1)

mass m = ?

V = 450 mL = 0.45 L = 0.45*10^(-3) m^3

P = 145 mmHg = 145*10^(-3) mHg 145*10^(-3)*13.6*10^3*9.8 = 19325.60 Pa

(Because, P = h*density*g)

T = 62.5 degree C = ...

#### Solution Summary

The solution employs the theory of ideal gases to find the mass and volume oxygen will occupy in various conditions, using simple step-by-step calculations.

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