Question

calculate the gram molecular mass 90g H2o ( molecular mass of H2o is 18 g)​

Answer 1

Answer:

A mole of a compound is a number of grams equal to the atomic weight of a molecule of the compound, so for water we have 2 hydrogen atoms and one oxygen, so the atomic weight of water is 1+1+16=18, so a mole of water is 18 grams. We have 90g of water so we have 90/18 = 5 moles of water.

Answer 2

Gram Molecular Mass (GMM) :-

90g of H2O

= 90g/18g = 5 moles