How many moles of oxygen atoms are in 6.3E-1 moles of CO?
Only give the numeric value of your answer. Don't include the units.
A laboratory analysis of an unknown sample yields 39.99% carbon, 6.73% hydrogen, and 53.28% oxygen. If the sample has a molar mass of 60.06 g/mol, what is the molecular formula of the sample?
How many atoms of hydrogen are in 2.29E+1 g of methane?