Chemistry student needs of thiophene for an experiment. She has available of a w/w solution of thiophene in carbon tetrachloride. Calculate the mass of solution the student should use. If there's not enough solution, press the "No solution" button.

The question is incomplete, here is the complete question:

A chemistry student needs 75 g of thiophene foran experiment. He has available 0.50 kg of a 29.3% w/w solution of thiophene in carbon tetrachloride.

Calculate the mass of solution the student should use. If there's not enough solution, press the "No solution" button.

The mass of solution the student should use is 255.97 grams

Explanation:

We are given:

Mass of thiophene needed = 75 gram

29.3 % w/w thiophene solution

This means that 29.3 grams of thiophene is present in 100 grams of solution

Applying unitary method:

If 29.3 grams of thiophene is present in 100 grams of solution

So, 75 grams of thiophene will be present in =

Given amount of solution = 0.50 kg = 500 grams   (Conversion factor:  1 kg = 1000 g)

Hence, the mass of solution the student should use is 255.97 grams

it's filtration, but this is an assumption so my apologies if i got this