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23-01-2024
Chemistry

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Which of the following would contain the same number of atoms as 20 grams of calcium? (Atomic masses: Ca = 40, Mg = 24, C = 12)
a) 40 grams of magnesium
b) 30 grams of carbon
c) 10 grams of calcium
d) 20 grams of a different isotope of calcium

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