Study Guides/Chemistry/HNO3 Molar Mass
Study Guide · Chemistry

Molar Mass of HNO3 (Nitric Acid)

HNO₃ is the chemical formula for Nitric Acid, a highly corrosive and strong mineral acid. Let's calculate its molar mass (molecular weight) step by step.

Question (Click to Flip)

What is the molar mass of HNO3?

Answer

The molar mass of HNO3 (Nitric Acid) is exactly 63 g/mol.

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Key Facts

Chemical Name: Nitric Acid.

Formula: HNO₃.

Atomic Masses: H (1), N (14), O (16).

Total Molar Mass: 63 g/mol.

Step 1: Identify the Atoms and their Atomic Masses

To calculate the molar mass, we need the atomic masses of all the individual elements present in the formula:

  • Hydrogen (H): ~ 1 g/mol
  • Nitrogen (N): ~ 14 g/mol
  • Oxygen (O): ~ 16 g/mol

Step 2: Multiply by the Number of Atoms

In the formula HNO₃, we have:

  • 1 atom of Hydrogen: 1 × 1 = 1 g/mol
  • 1 atom of Nitrogen: 1 × 14 = 14 g/mol
  • 3 atoms of Oxygen: 3 × 16 = 48 g/mol

Step 3: Add them together

Total Molar Mass = (Mass of H) + (Mass of N) + (Mass of O₃) Total Molar Mass = 1 + 14 + 48 = 63 g/mol

Therefore, the molar mass of HNO₃ (Nitric Acid) is 63 grams per mole.

Questions and Answers

What is the molar mass of HNO3?+

The molar mass of HNO3 (Nitric Acid) is exactly 63 g/mol.

How do you calculate the molecular mass of HNO3?+

You calculate it by adding the atomic masses of its elements: 1 Hydrogen (1) + 1 Nitrogen (14) + 3 Oxygens (16 x 3 = 48). 1 + 14 + 48 = 63 g/mol.

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