What is the molar mass of NaNO3?

• A. 69.00 g/mol
• B. 101.99 g/mol
• C. 119.00 g/mol
• D. 85.00 g/mol

Answer: (B)

Verified step by step guidance

1. Identify the chemical formula of the compound, which is NaNO3 (sodium nitrate).
2. List the atomic masses of each element in the compound: Sodium (Na), Nitrogen (N), and Oxygen (O). You can find these values on the periodic table. For example, approximate atomic masses are Na = 22.99 g/mol, N = 14.01 g/mol, and O = 16.00 g/mol.
3. Determine the number of atoms of each element in the formula: 1 Na, 1 N, and 3 O atoms.
4. Calculate the total mass contributed by each element by multiplying the atomic mass by the number of atoms: for example, total mass of oxygen = 3 \times 16.00 g/mol.
5. Add the masses of all elements together to find the molar mass of NaNO3 using the formula: \(\text{Molar mass} = (1 \times \text{atomic mass of Na}) + (1 \times \text{atomic mass of N}) + (3 \times \text{atomic mass of O})\).