If you have 3.50 moles of oxygen, how many moles of methane will you need to have a complete reaction?

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?

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-

What are the constituent metals of stainless steel?