Question

Find,which would weight more,2mole of CaCO3 or 10 mole of H2O.

Answer 1

CaCO3 would weight more, 2 mole of CaCO3.

Answer 2

The weight of 2 mole of $CaCO_3$ is more than $H_2O$.

Explanation:

Firstly it is required to find the molecular weight of $CaCO_3\ and\ H_2O$.

The molecular mass of $CaCO_3$ is,

Atomic mass of calcium is 40 u

Atomic mass of carbon is 12 u

Atomic mass of 3 atoms of Oxygen is 48 u

Molecular mass of $CaCO_3$ is 100 u

Weight of 2 moles of $CaCO_3$ is 200 u

The molecular mass of $H_2O$ is,

Atomic mass of 2 atoms of Hydrogen is 2

Atomic mass of Oxygen is 16 u

Weight of the mass of $H_2O$ is 18 u

It is clear that, weight of 2 mole of $CaCO_3$ is more than $H_2O$. Hence, this is the required solution.

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Mole concept

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