The number of molecules in 1.7 gram of ammonia will be:
0.1
6.02×1022
6.02×1023
3.02×1023
A
0.1
B
6.02×1023
C
6.02×1022
D
3.02×1023
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Solution
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1.7 gram of ammonia (molecular weight 17 g/mol) =1.7g17g/mol=0.1mol. The number of molecules in 1.7 gram of ammonia =0.1mol×6.02×1023molecules/mol=6.02×1022molecules
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