How many moles of water are produced from 3.7 moles of oxygen gas given the unbalanced equation below? _H(g) + O2(g) -->_HO(1) Please types your answer in standard notation with the proper number of significant figures without units (units are moles) In the complete combustion of CH4. how many grams of oxygen gas are needed when 23.8 g of CH4 burns? Please type your answer in standard notation with the proper number of significant figures without units (units are grams)