What amount of substance is 5.4 g of water?
| February 7, 2021 | education
Given:
m (H2O) = 5.4 g.
To find:
n (H2O) -?
Decision:
If we know the mass of a substance, then its amount can be found by the formula n = m / M (Where n is the amount of the substance, m is the mass of the substance, M is the molar mass of the substance).
Molar mass (M) of water (H2O) = 18 g / mol.
Now we substitute the known to the formula for finding the amount of substance.
n (H2O) = 5.4 g / 18 g / mol.
n (H2O) = 0.3 mol.
Answer: n (H2O) = 0.3 mol.
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