What is the volume percent of ethanol in a solution made by mixing 30 mL of etha

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Question: What is the volume percent of ethanol in a solution made by mixing 30 mL of ethanol with 70 mL of water?

Options:

Correct Answer: 30%

Solution:

Volume percent = (volume of solute / total volume) × 100 = (30 mL / (30 mL + 70 mL)) × 100 = 30%.

What is the volume percent of ethanol in a solution made by mixing 30 mL of ethanol with 70 mL of water?

What is the volume percent of ethanol in a solution made by mixing 30 mL of ethanol with 70 mL of water?

Correct Answer: 30%

Step 1: Identify the volume of ethanol (solute) in the solution. In this case, it is 30 mL.
Step 2: Identify the volume of water (solvent) in the solution. In this case, it is 70 mL.
Step 3: Calculate the total volume of the solution by adding the volume of ethanol and the volume of water together. Total volume = 30 mL + 70 mL = 100 mL.
Step 4: Use the formula for volume percent, which is (volume of solute / total volume) × 100.
Step 5: Plug in the values: (30 mL / 100 mL) × 100.
Step 6: Calculate the result: (30 / 100) × 100 = 30%.
Step 7: Conclude that the volume percent of ethanol in the solution is 30%.

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