Question Detail

CHM 101 CHM 101 Past Questions Objective Question
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Question

Which element has the highest percentage composition in KMnO₄?
Options
A Potassium
B Oxygen
Correct Answer
C Manganese
D All are equal
Correct Answer

Option B is the correct answer.

Detailed Explanation

Molar mass KMnO₄ = 39.10 + 54.94 + (4 × 16.00) = 158.04 g/mol. Mass of O = 64.00 g. % O = (64.00/158.04) × 100 = 40.5%. Mass of K = 39.10g (24.7%), Mn = 54.94g (34.8%). Oxygen has the highest percentage.

Hint

Calculate the total mass contributed by each element and compare.

Question Info

Course: CHM 101
Topic: CHM 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 349 of 1872
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