Calculate the mass of CaCO3 that would produce 40 mL at STP.

STP means P= 1 atm and T= 0 degrees C.

How do I find the mass?

1 answer

Use PV = nRT.
You know P, V, R, and T. Don't forget to change T to Kelvin (273 + C = K). Use V in liters. Solve for n. Then n = # mols = grams/molar mass.