Dimensional analysis question #2

Question

How many grams of iron(iii) cyanide in 3.26 grams of Fe³⁺?

Answer 1

I'm guessing you mean to ask "how many grams of iron(III) cyanide contain 3.26 grams of Fe³⁺?"

Formula of iron(III) cyanide is Fe(CN)₃ and molar mass is 133.899 g/mol

Using dimensional analysis:

3.26 g Fe3⁺ x 1 mole Fe/55.85 g Fe x 1 mol Fe(CN)₃/mol Fe x 133.9 g Fe(CN)₃/mol = 7.82 g Fe(CN)₃