What volume (in liters) of oxygen gas could be produced at STP if 125.9 g of calcium chlorate decompose?

Question

This is the equation:

Ca(Cl03)2 -> CaCl2 + 3O2

*Also determine the mass of calcium chloride that could form if 67.8 g of oxygen are produced at 31 degree Celsius and 755 mmHg?

Answer 1

Find the moles of O2 first using the mole ratio. Use this link for help.

https://youtu.be/2spz4y7iTBs