Chemistry-Atomic & Molecular Mass
NEET Chemistry Atomic & Molecular Mass MCQ Question
Type: MCQ-numerical-Hard-Class 11
Calculate the mass percent of sodium in sodium acetate (CH3COONa) given its molar mass is 82.0245 g/mol.
A
27.37%
B
30.43%
C
15.29%
D
22.54%
Correct Answer
Option A
Detailed Explanation
The mass percent of sodium is calculated as (mass of Na/molar mass of CH3COONa) x 100. Here, the mass of Na is 22.99 g/mol, so (22.99/82.0245) x 100 = 27.37%.
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