Question

1. determine the percent composition of each element in lif.

Explanation:

Step1: Find molar masses of elements

Molar mass of Li ≈ 6.94 g/mol; molar mass of F ≈ 19.00 g/mol
Molar mass of LiF = 6.94 + 19.00 = 25.94 g/mol

Step2: Calculate % of Li

% Li = $\frac{6.94}{25.94} \times 100 ≈ 26.8\%$

Step3: Calculate % of F

% F = $\frac{19.00}{25.94} \times 100 ≈ 73.2\%$

Answer:

Lithium: ~26.8%, Fluorine: ~73.2%