Question

How many grams of salt are needed to make 165 g of salt water that is 37.5% salt by mass?

a) 37.5 g
b) 61.88 g
c) 220 g
d) 123.75 g

Answer 1

The correct answer is b) 61.88 g of salt needed to make 165 g of salt water with 37.5% salt by mass. You calculate this by multiplying the total mass of the solution by the mass percentage of the salt.

Step-by-step explanation:

To determine how many grams of salt are needed to make 165 g of salt water that is 37.5% salt by mass, we can set up a simple equation based on the mass percentage formula:

Mass of salt = Mass of salt water × Mass percentage of salt

This calculation yields the following:

Mass of salt = 165 g × 0.375

After performing the multiplication, we find that:

Mass of salt = 61.875 g

This value can be rounded to the nearest hundredth, giving us a final answer of:

Mass of salt = 61.88 g

Therefore, the correct answer is b) 61.88 g of salt needed to prepare the solution.