In the lab, students generated and collected oxygen gas according to the following equation: 2H2O2(aq)-->2H2O(l) + O2(gas)
a. How many ml of oxygen gas at STP were generated from 50.0g of H2O2?
b. If 225ml of oxygen gas at STP were needed for an experiment, how many moles of H2O2 would be needed?