Some Basic Concepts Of Chemistry Question 151

Question: How many H-atoms are present in 0.046 got ethanol?

Options:

A) 6×1020

B) 1.2×1021

C) 3×1021

D) 3.6×1021

Show Answer

Answer:

Correct Answer: D

Solution:

[d] Molecular weight of C2H5OH=2×12+5+16+1=64

48 g C2H5OH has H atom =6×NA

0.046 g C2H5OH has H atoms =6×6.02×1023×0.04646=3.6×1021



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