What is the combined mass (in grams) of the non-aspirin components (phenacetin and caffeine) in the 1.255 kg powder?

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Multiple Choice

What is the combined mass (in grams) of the non-aspirin components (phenacetin and caffeine) in the 1.255 kg powder?

Explanation:
This question uses mass fractions to find a portion of a total mass. The non-aspirin components make up 40% of the powder. Convert the total mass to grams: 1.255 kg equals 1255 g. Multiply by the fraction of the non-aspirin components: 1255 g × 0.40 = 502 g. So the combined mass of phenacetin and caffeine is 502 g. (As a check, aspirin would then be 60% of 1255 g, which is 753 g; 753 g + 502 g = 1255 g, consistent.)

This question uses mass fractions to find a portion of a total mass. The non-aspirin components make up 40% of the powder. Convert the total mass to grams: 1.255 kg equals 1255 g. Multiply by the fraction of the non-aspirin components: 1255 g × 0.40 = 502 g. So the combined mass of phenacetin and caffeine is 502 g. (As a check, aspirin would then be 60% of 1255 g, which is 753 g; 753 g + 502 g = 1255 g, consistent.)

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