Problem 1: Convert 56g of water into moles?
We know that the mass of water is 56g. The molecular mass is noted for this calculation instead of atomic mass, as water is a molecule.
Molecular mass of water = 18.015g/mol
Grams to moles conversion equation is,
Moles = 56/18.015
Moles = 3.10 mol
We know that the mass of oxygen is 30g.
Atomic weight of oxygen = 16g/mol
Grams to Moles conversion equation is,
Moles = 30/16
Moles = 1.875 mol