Answer to Question #107327 in General Chemistry for Chisom

Question

Calculate the volume of carbon IV oxide evolved at s.t.p by dissolving 20grams of pure marble, CaCO3 in dilute trioxonitrate v acid

Answer 1

CaCO3 = CO2

1 mol produce 1 mole

20 g / 100 g/mol = 0.2 mol CaCO3

So n (CO2) = 0.2 mol as well!

STP:

273.15 K

10⁵ Pascals

1 mole of an ideal gas has a volume of 22.4 liters

V (CO2) = 0.2*22.4 = 4.48 L.