Question

An oven-cleaning solution is 40.0% (by mass) NaOH.

Answer 1

The amount of NaOH by mass the jar contains will be 183.2 g

Percent composition

The percent by mass of NaOH in the oven-cleaning solution is 40.0%.

This means that for every 100 g of the cleaning solution, there would be 40 g of NaOH.

Now, the jar in question contains 458 g of this solution which is 40.0% NaOH by mass.

The amount of NaOH in the jar can be calculated as:

             40/100 x 458 = 183.2 g

This means that 458 g of the oven-cleaning solution that is present in the jar contains 183.2 g of NaOH.

More on percent composition can be found here: brainly.com/question/17505281

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