How many moles are there in a 1.80 kg bottle of water?

Moles=mass/molar mass of water. the molar mass of water is found to be 18g which is calculated adding the molar mass of hydrogen plus that of oxygen that is (2x 16) + (1 x2) = 18g/mol

convert Kg to grams that is 1.8kg x 1000=1800g

moles is therefore 1800g / 18g/mol=100 mol