Question

unit exam - ionic compounds and metals
9 f 19.00
20 ca 40.08
what is the molar mass of the ionic compound caf2?
caf2 = ? $\frac{g}{mol}$

Explanation:

Step1: Identify molar - mass of elements

The molar mass of Ca is $40.08\ g/mol$ and the molar mass of F is $19.00\ g/mol$.

Step2: Calculate molar - mass of $CaF_2$

The formula for the molar mass of $CaF_2$ is $M = M_{Ca}+2\times M_{F}$. Substitute the molar - masses: $M = 40.08\ g/mol+2\times19.00\ g/mol$.
$M = 40.08\ g/mol + 38.00\ g/mol=78.08\ g/mol$.

Answer:

$78.08$