hiw many atoms of carbon are present in 7.8g of beneze

Asked by sofisalman584 | 21st Sep, 2021, 10:26: AM

Expert Answer:

Molar mass of benzene is 78 g/mole. 
Number of moles of benzene would be-
 
N u m b e r space o f space m o l e s space o f space B e n z e n e equals fraction numerator M a s s space i n space g over denominator M o l a r space m a s s end fraction equals fraction numerator 7.8 over denominator 78 end fraction equals 0.1 space m o l e
1 space m o l e space o f space b e n z e n e space h a v e equals space 6.022 space cross times 10 to the power of 23 space m o l e c u l e s
0.1 space m o l e space o f space b e n z e n e space w i l l space h a v e equals space 0.1 space cross times space 6.022 space cross times 10 to the power of 23 equals 6.022 cross times 10 to the power of 22 space space m o l e c u l e s

I n space 1 space m o l e space o f space B e n z e n e comma space n u m b e r space o f space c a r b o n space a t o m s space p r e s e n t space i n space o n e space b e n z e n e space m o l e c u l e space i s space 6
6.022 space cross times 10 to the power of 22 space m o l e c u l e s space w i l l space h a v e equals 6.022 cross times 10 to the power of 22 cross times 6 equals 36.132 cross times 10 to the power of 22 space a t o m s

Answered by Ravi | 22nd Sep, 2021, 07:16: PM