How much does 9 grams of water contain?

univerkov | December 19, 2020 | education

Given
m H2O = 9 g.
N H2O-?
Decision:
M H2O = 1 * 2 + 16 = 18 g / mol
n = 9/18 = 0.5 mol
n = N / NA;
N = N * NA
N = 6 * 0.5 * 10 ^ 23 = 3 * 10 ^ 23
Answer: N H2O = 3 * 10 ^ 23.

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