To convert from mass of X to liters of Y in any stoichiometry problem, the following steps must be followed
A. mass X to moles X to moles Y to liters Y
B. mass X to moles X to mass Y to liters Y
C. mass X to liters Y
D. mass X to moles Y to liters Y
( Please Help )

A. mass X to moles X to moles Y to liters Y

Explanation:

Remember: moles are the great converter. They're basically just a made-up concept meant to facilitate conversions!

Starting with mass X, you must then convert to moles X.

Once you have moles X, convert  moles Y. Think of a chemical equation: the mole ratios are the coefficients!

Once you have moles Y, all you have to do is convert to liters Y. You can do this with the molarity equation M = mol/L, or if it's a gas at STP you know the conversion!

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation: