Calculate the number of moles of nitric acid weighing 250 grams.

The number of moles is calculated by the formula: n = m / M, where n is the amount, m is the mass, M is the molar mass.
M (HNO3) = 1 + 14 + 48 = 63 mol.
n = 250/63 = 3.968 mol.
Answer: 3.968 mol.



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