Question

what is the formula unit mass of Ca(OH)2​

Answer 1

Formula Unit mass is the sum of the atomic masses of all atoms in a formula unit of a compound.

F.U.M. of Ca(OH)₂,

Ca atoms- 1

O atoms- 2

H atoms- 2

∴ The formula unit mass =

$1\times 40+2\times 16+2\times 1\\= 40+32+2\\= 74u$

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