how many moles of carbon are in 18.6 g of glucose (C6H12O6)? in moles?

Question

do u have to add up C 6 H 12 O 6 which equals 64.0648
then i dont know

Answer 1

1 mole carbon = 12g
1 mole glucose = 180g

As you state, glucose is C6 H12 06, so there are 6 moles of carbon in 1 mole of glucose.

18.6g divided by 180g = 0.1033 moles

Of course my chemistry A Level was 10 years ago so I'm a bit rusty, but I think my maths is correct.

EDIT* 0.1033 is the number of glucose moles, so you have to multiply by 6.

Answer 2

Using the values of 12, 1 and 16 for the atomic masses of C,H, and O, the molar mass of glucose is 180. not 64

Now, divide the 18.6 g with molar mass to get the NUMBER OF MOLES of glucose. which is about 0.103 moles.

BUT, there are six carbons for every mole of glucose. So multiply the moles of glucose by 6.
0.103 x 6 = 0 .618 moles of C

Note the sig figs. Just be careful when adding atomic masses to get MOLAR MASSES.

Answer 3

Ar of Carbon(C)=12
Ar of Oxygen(O)=16
Ar of Hydrogen(H) = 1
Mr of Glucose= 180
Number of moles of glucose in 18.6g of C6H12O6
= mass / molar mass (or Mr)
= 18.6/180
= 0.1033 moles
Number of moles of Carbon atoms is therefore
= 6x1.033 (because there are 6 carbon atoms in the compound)
= 0.62 moles
Hope its simple enough to understand.

Answer 4

6*18.6gr/(180gr/mole)=0.62mole