Question

A student obtains a yield of 79% from his salicylic acid. How many grams of salicylic acid will the student need to produce 135 g of aspirin?

Answer 1

Ask yourself,
79% of what = 135 or
0.79*x = 135, then

135/0.79 = x

Answer 2

okay so what that guy said is right but here is the whole thing

135g / 0.79 = 170.886 g of SA (salicylic acid)

my chem teacher told me i did it right soooo