What is the % by mass for the salt if there are 5 grams of salt dissolved in 75 grams of water?a.12.50%b.3.15%c.6.25%d.25%
Question
What is the % by mass for the salt if there are 5 grams of salt dissolved in 75 grams of water?
a. 12.50%
b. 3.15%
c. 6.25%
d. 25%
Solution
To calculate the percentage by mass of the salt in the solution, you need to follow these steps:
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First, you need to find the total mass of the solution. This is done by adding the mass of the salt to the mass of the water. In this case, 5 grams (salt) + 75 grams (water) = 80 grams (total mass of the solution).
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Next, you need to calculate the percentage by mass of the salt. This is done by dividing the mass of the salt by the total mass of the solution, and then multiplying the result by 100 to get a percentage. In this case, (5 grams / 80 grams) * 100 = 6.25%.
So, the correct answer is c. 6.25%.
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