Number of grams of perchloric acid in 4.25 x 10^-4 mol of perchloric acid

Answer: 0.043g

Explanation:

chemical formular of perchloric acid is HClO4

no. of moles = mass / molar mass

n = m / mm

m = n x mm

n = 4.25 x 10^-4 mol

m = ?

mm = 1 + 35.5 + (16 x 4) = 100.5g/mol

m = 4.25 x 10^-4 mol x 100.5g/mol

m = 0.043g