The weight of one mole of heavy water is:

18

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20

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Solution

The correct option is A $20$ gm
Deuterium is called as heavy water,

As atomic mass of Deuterium is 2 and atomic mass of oxygen is 16

So Molar mass of $D_{2} O$ is = $2 \times 2 + 1 \times 16 = 20$

Weight of $1$ mole of $D_{2} O =$ Molecular mass of $D_{2} O = 20$ gm

Option B is correct.

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The weight of one mole of heavy water is:

The correct option is A 20 gm Deuterium is called as heavy water,As atomic mass of Deuterium is 2 and atomic mass of oxygen is 16So Molar mass of D2O is = 2×2+1×16=20Weight of 1 mole of D2O= Molecular mass of D2O=20 gmOption B is correct.

The correct option is A $20$ gm
Deuterium is called as heavy water,

As atomic mass of Deuterium is 2 and atomic mass of oxygen is 16

So Molar mass of $D_{2} O$ is = $2 \times 2 + 1 \times 16 = 20$

Weight of $1$ mole of $D_{2} O =$ Molecular mass of $D_{2} O = 20$ gm

Option B is correct.