Question

Tin(II) fluoride (SnF2) is addrd to toothpaste to strengthen tooth enamel. How many grams of tin(II) fluoride contain 1.46g of F

Answer 1

no of moles = mass / molar mass

for F = 1.46g / 19 g/mol => 0.0768 mol

1 mol SnF2 contains the 2 moles of F i.e

1 mol SnF2 --------------------> 2 mol F

? ---------------------------------> 0.0768 mol

=> 0.0768 * 1 / 2

=> 0.03842 moles

mass of SnF2 = 0.0384 moles * 156.69 g/mol

=> 6.02 grams

answer => 6.02 g