Question 556220
10cm^3 of a normal specimen of human blood contains 1.2 g of hemoglobin.
How many grams does 31 cm^3 of the same blood cantain?
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Use a proportion:
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x/31 = 1.2/10
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x = 3.1*1.2 = 3.72 g's

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Cheers,
Stan H.
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31 cm^3 of the blood cantain 3.72 grams of hemoglobin