## Trending News

# how do you find the volume of a certain quantities at STP ?

gasses at STP ex. 60 g of CO2

### 4 Answers

- Anonymous1 decade agoFavorite Answer
STP means

273.15 K

1 bar.

Use ideal gas law

PV=nRT

P is the pressure in bar

V is the volume in L

n is the number of moles of gas

R is the ideal gas constant = 0.08314 bar L / mol K

T is the temperature in K

n=m/M

Hence for your 60 grams of CO2 (M=44g/mol)

V=60/44 mol * 0.08314 bar L/mol K * 273.15 K /1 bar = 31 L

- 1 decade ago
1 mole ( Gram molecular weight) of a compound or element is the atomic mass expressed in grams. The atomic mass can be found on a Perodic Chart of the elements.

1 mole of a gas at STP occupies 22.4 liters of space.

Atomic mass of Carbon is 12 grams/mole.

Atomic mass of Oxygen is 16 grams/mole.

Therefore the atomic mass of CO2 is (2x16) + 12 = 44.

60 grams of CO2 = 60 / 44 = 1.36 moles.

1.36 moles x 22.4 Liters = 30.46 Liters

- Anonymous1 decade ago
1 mole of any gas occupies 22.4L at STP, so you figure out the moles of CO2, and multiply by 22.4L.