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Q: What is the molecular mass of nitric acid?
  • A. 63 u
  • B. 70 u
  • C. 45 u
  • D. 36 u
Correct Answer: Option A - The molecular mass of a substance is the sum of atomic masses of all elements present in a molecule of the substance. Molecular mass of Nitric Acid (HNO3)- Mass of Hydrogen (H) · 1u Mass of Nitrogen (N) · 14u Mass of Oxygen (O) · 16u Molecular mass of HNO₃ = (1×1)+(1×14)+(16×3) = 1 + 14 + 48 = 63u
A. The molecular mass of a substance is the sum of atomic masses of all elements present in a molecule of the substance. Molecular mass of Nitric Acid (HNO3)- Mass of Hydrogen (H) · 1u Mass of Nitrogen (N) · 14u Mass of Oxygen (O) · 16u Molecular mass of HNO₃ = (1×1)+(1×14)+(16×3) = 1 + 14 + 48 = 63u

Explanations:

The molecular mass of a substance is the sum of atomic masses of all elements present in a molecule of the substance. Molecular mass of Nitric Acid (HNO3)- Mass of Hydrogen (H) · 1u Mass of Nitrogen (N) · 14u Mass of Oxygen (O) · 16u Molecular mass of HNO₃ = (1×1)+(1×14)+(16×3) = 1 + 14 + 48 = 63u