Question

Select the INCORRECT pair of molecule/formula units and their molar mass from the following.

• A. NaCl-58.5
• B. HNO3-62
• C. HCI-36.5
• D. CH-16

Answer 1

Answer:

B. HNO3-62

Calculating Molar Mass

The molar mass of a compound is determined by summing the atomic masses of all atoms present in its chemical formula. Atomic masses are typically found on the periodic table.

Example Calculation for HNO3 (Nitric Acid)

• H (Hydrogen): Atomic mass is approximately 1 g/mol.

• N (Nitrogen): Atomic mass is approximately 14 g/mol.

• O (Oxygen): Atomic mass is approximately 16 g/mol.