The molecular formula of calcium chloride is CaCl2. What is the molecular weight of this drug?

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The molecular formula of calcium chloride is CaCl2. What is the molecular weight of this drug?

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Answer 1 · 2015-12-23T06:35:51

$111$ $111$ $g$ $g$ / $mol$ $"mol"$

Explanation:

Weight of $C a$ $Ca$ = $40$ $40$
Weight of $C l$ $Cl$ = $35.5$ $35.5$

Molecular formula is $C a C l_{2}$ $CaCl_2$ i.e. $1$ $1$ atom of $C a$ $Ca$ and $2$ $2$ atoms of $C l$ $Cl$ .

Hence, molecular weight = $1 x 40 + 2 x 35.5$ $"1 x 40 + 2 x 35.5"$ = 40 + 71 = $111$ $111$ $g$ $g$ / $mol$ $"mol"$ . But if you look at the weight online, it says $110.98$ $110.98$ $g$ $g$ / $mol$ $"mol"$ , which is close to $111$ $111$ .

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The molecular formula of calcium chloride is CaCl2. What is the molecular weight of this drug?

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