Question

Calculate the mass of the following: 2 moles of water

Answer 1

The molecular mass of two moles of water is 36 grams.

Given: 2 moles of water.

To find: We have to find the mass.

Solution:

The chemical formula of water is $H_2O$.

H has mass 1 and oxygen has an atomic mass of 16.

Thus the molecular mass of water is 2×1+16=18.

One mole of water has a molecular mass of 18 grams.

Two moles of water have a molecular mass of 18×2=36 grams.

Thus the molecular mass of two moles of water is 36 grams.

Answer 2

Answer:

36u

Explanation:

number of moles=molar mass/given mass

2=molar mass/2×1+16

2=molar mass/18

2x18=molar mass

26u=molar mass