What is the percentage by mass of a solution containing 5 g of NaCl in 95 g of w

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Question: What is the percentage by mass of a solution containing 5 g of NaCl in 95 g of water?

Options:

Correct Answer: 5%

Solution:

Percentage by mass = (mass of solute / total mass) × 100 = (5 g / (5 g + 95 g)) × 100 = 5%.

What is the percentage by mass of a solution containing 5 g of NaCl in 95 g of water?

What is the percentage by mass of a solution containing 5 g of NaCl in 95 g of water?

Step 1: Identify the mass of the solute (NaCl), which is 5 g.
Step 2: Identify the mass of the solvent (water), which is 95 g.
Step 3: Calculate the total mass of the solution by adding the mass of the solute and the mass of the solvent: 5 g + 95 g = 100 g.
Step 4: Use the formula for percentage by mass: (mass of solute / total mass) × 100.
Step 5: Substitute the values into the formula: (5 g / 100 g) × 100.
Step 6: Calculate the result: (5 / 100) × 100 = 5%.

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