How many carbon atoms in a #6*g# mass of glucose?

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Answer 1 · 2017-06-21T17:29:10

Approx. #10^23# individual carbon atoms........

We know that glucose, #C_6H_12O_6#, has a molar mass of #180.16*g*mol^-1#.

And so (i) we calculate the molar quantity of the #6*g# mass......

#"Moles of glucose"-=(6*g)/(180.16*g*mol^-1)=0.0333*mol#

And so we gots #0.0333*mol# of glucose; but we further know that IN EACH MOLE of glucose there are six moles of carbon...

And so there are (ii).....................

#0.0333*molxx6*"atoms"xxN_A=0.200*molxxN_A#

i.e. #0.200*molxx6.022xx10^23*mol^-1=1.20xx10^23*"carbon atoms."#