# The Molecular mass of HNO3 is _____?

By BYJU'S Exam Prep

Updated on: September 25th, 2023

(A) 61 u

(B) 62 u

(C) 63 u

(D) 64 u

The Molecular mass of HNO3 is 63 u. The molecular formula of the substance, which uses subscripts to show the atoms that make up the compound and the number of molecules in each one. If the molecular formula is known, one can compute:

• Molecular mass or molar mass.
• Percentage of elements in the compound.

### Explain Molecular Mass

The molecular mass of any material is calculated by adding the masses of all of its constituent atoms. It is the molecular weight of a single chemical. A substance’s molecular mass, or the mass of its 6.022 × 1023 particles, is referred to as its molar mass.

• The symbol for a unit’s mass is the atomic mass unit, also known as the letter u.
• If the percentage composition and molar mass are known, it is possible to derive the empirical formula, which expresses the formula in the simplest whole-number ratio.

Nitric acid’s (HNO3) molecular weight is 63 u. The total mass of all the atoms in a given molecule is known as its molecular mass. It is represented in units of atomic mass (amu). As an illustration, the molecular weight of HNO3 can be calculated as:

H has an atomic mass of 1u.

N has an atomic mass of 14u.

O has an atomic mass of 16u.

Molecular mass of HNO3 = 1 + 14 + (16 × 3) = 63u.

The correct answer is Option(3).i.e. 63 u.

Summary:

## The Molecular mass of HNO3 is _____? (A) 61 u (B) 62 u (C) 63 u (D) 64 u

The Molecular mass of HNO3 is 63 u. The substance’s molecular formula, which uses subscripts to show the atoms that make up the compound and how many molecules there are in total.

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