Here's the question you clicked on:
bugsey7
Make this a third, I'm tired and I just wanna pass this dumb class >_< How many grams of a stock solution that is 87.0 percent H2SO4 by mass would be needed to make 200 grams of a 35.5 percent by mass solution? Show all of the work needed to solve this problem.
Use c1(v1) = c2(v2) to solve that problem. 87%(200) = (35.5%)v2 v2 ≈ 490.5