Question Detail

CHM 101 CHM 101 Past Questions Objective Question
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Question

What is the molar mass of Na₂CO₃?
Options
A 85.0 g/mol
B 105.99 g/mol
Correct Answer
C 58.44 g/mol
D 44.01 g/mol
Correct Answer

Option B is the correct answer.

Detailed Explanation

Molar mass Na₂CO₃ = (2 × atomic mass Na) + atomic mass C + (3 × atomic mass O) = (2 × 22.99) + 12.01 + (3 × 16.00) = 45.98 + 12.01 + 48.00 = 105.99 g/mol.

Hint

Add the atomic masses of two sodium atoms, one carbon atom, and three oxygen atoms.

Question Info

Course: CHM 101
Topic: CHM 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 348 of 1872
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