Answers

2015-05-28T13:46:06+05:30
Molar mass of ethanol can be calculated as following- (MM means molar mass)
MM of C * 2 + MM of H *5 + MM of O + MM of H
(12*2)+(1*5)+(16)+(1)
24+5+16+1
46 g
Now, 
Since, in 46g of C2H5OH -->6 H atoms are present 
So, in 2.3 g of C2H5OH --> 6*2.3/46 = 0.3 H atoms
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