We are asked to calculate the number of moles in a 1.52 kilogram sample of glucose ( C6 , H12 , 06
To calculate this lets take carbon , it has a relative mass of 12.01 aka molar mass , that means carbon has 12.01 grams per mole
We just took carbon to calculate the molar mass , now lets take hydrogen thus it would be 1.00784 grams per mole in quantity
We just did molar mass calculation of carbon and hydrogen , now lets do it on oxygen , It would be 15.9994 grams per mole in quantity
Conclusion of the example
We just assumed every atoms mole mass , now to the actual amount of atoms we have to do multiplication , 12.01 times 6 , 1.00784 times 12 and 15.9994 times 6
Answer : 72.06 , 12.09408 and 95.9964 are the mass of molecules there
We can now conclude that carbon has a molar mass of 72.06 grams per mole , carbon has a molar mass of 12.09408 grams per mole and oxygen has 95.9964 grams per mole
1.52 kg into 1000 g / 1 kg into 1/180.16 mole C6 , H12 , 06 , 1.52 into 1000 = 1520 , 1520 is the number of grams of glucose we have , 1520 / 180.16 = 8.44 moles of glucose