Question

How many grams of salt are needed to make 745 g of salt water that is 38.5 % salt by mass

Answer 1

Answer:

286.825 or 287

Explanation:

To do this, you need to convert 38.5% to a decimal (0.385) and multiply it by 745.

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Answer 2

Answer:

We need 286.6 grams of salt to make a salt water solution that has a mass % of 38.5 %

Explanation:

Step 1: Data given

Mass of salt water = 745 grams

% salt by mass  = 38.5 %

Step 2: Calculate grams of salt in the solution

Mass of salt = mass % * total mass

Mass of salt = 0.385 * 745 =  286.8 grams salt

This means we need 286.6 grams of salt to make a salt water solution that has a mass % of 38.5 %