A student wants to know how many grams of water are made from 5.00g of oxygen gas. Which step goes in the spot with the question mark?

Idon’t know how to solve this question

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?