An oven-cleaning solution is 40.0% (by mass) NaOH. If one jar of this product contains 457.0 g of solution, how much NaOH does it contain?
A) g
B) 11.4 g
C) 183 g
D) 18.3 g
E) none of these

Question

An oven-cleaning solution is 40.0% (by mass) NaOH. If one jar of this product contains 457.0 g of solution, how much NaOH does it contain?
A) g 
B) 11.4 g 
C) 183 g 
D) 18.3 g 
E) none of these

Quizplus · Accepted Answer

If the oven-cleaning solution is 40.0% NaOH by mass, then in 457.0 g of solution, the mass of NaOH is:
457.0 g x 0.40 = 182.8 g ≈ 183 g
Therefore, the correct answer is C.

An Oven-Cleaning Solution Is 40