A. 0.05
B. 0.10
C. 2.60
D. 2.80
Correct Answer:
Option A – 0.05
Explanation
(mass / molar mass) X (1000 / vol )
(0.28 / 56.0) X (1000 / 100 )
= 2.8 / 56
= 0.05 mol\dm³
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