How many moles of glucose are in 19.1g of glucose?

0.106 mol (3s. f.)

Explanation:

To find the number of moles, divide the mass of glucose (in grams) by its Mr. Glucose has a chemical formula of C6H12O6. To find the Mr, add all the Ar of all the atoms in C6H12O6.

Ar of C = 12, Ar of H = 1, Mr of O = 16

These Ar values can be found on the periodic table.

Mr of glucose = 6 (12) + 12 (1) + 6 (16) = 180

Moles of glucose

= mass : mr

= 19.1 : 180

= 0.106 mol (3 s. f.)