What is the percentage by mass of a solution containing 20 grams of solute in 18

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Question: What is the percentage by mass of a solution containing 20 grams of solute in 180 grams of solution?

Options:

Correct Answer: 20%

Solution:

Percentage by mass = (mass of solute / mass of solution) * 100 = (20 g / (20 g + 180 g)) * 100 = 20%.

What is the percentage by mass of a solution containing 20 grams of solute in 180 grams of solution?

What is the percentage by mass of a solution containing 20 grams of solute in 180 grams of solution?

Step 1: Identify the mass of the solute. In this case, it is 20 grams.
Step 2: Identify the mass of the solution. The solution is made up of the solute and the solvent. Here, the mass of the solution is 20 grams (solute) + 180 grams (solvent) = 200 grams.
Step 3: Use the formula for percentage by mass, which is (mass of solute / mass of solution) * 100.
Step 4: Plug in the values: (20 grams / 200 grams) * 100.
Step 5: Calculate the fraction: 20 grams / 200 grams = 0.1.
Step 6: Multiply by 100 to get the percentage: 0.1 * 100 = 10%.
Step 7: The final answer is that the percentage by mass of the solution is 10%.

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