mols = g/molar mass will get the first two.
I suppose this is at STP. L x (1 mol/22.4L) = mols, then use the above formula to convert mols to grams.
How many grams are in 2.6 moles of Maganese?
What is the mass of 14.7 moles of H2O?
What is the mass of 7.2 Liters of H2O?
2 answers
So for the first one would I divide 2.6 and the molar mass of Manganese which is 24.3 to get the answer?