Question

I need help and I would greatly appreciate it!:) I am stuck and confused:(

Question 3:
A sample of table sugar (sucrose, C12H22O11) has a mass of 1.604g.

A) Calculate the number of moles of C12H22O11

B) Calculate the number of moles of each element in C12H22O11.

C) Calculate the number of atoms of each element in C12H22O11.

Answer 1

Sucrose has an atomic mass of 342.2965 g/mol.
A mole of something = 6.02 x 10^23 atoms.
A mole of something = its molar mass.

Answer 2

A. You have 1.604 g of the sample.

1.604 g (1 mol sucrose / 342.3 g)= 0.00469 moles

Answer 3

Thank you @tracyy !!!:)
for part b what do I do next ?

Answer 4

for 1 mole of C12H22O11 you will have 12 moles of C (12 moles of C/1mol C12H22O11)
22 moles of H (22 moles of H/1mol C12H22O11)
11 moles of O (11 moles of O/1mol C12H22O11)

since you only have 0.00469 moles of C12H22O11 you have to multiply this number by the conversion factor for each element.

1 mole of atoms has 6.02 x 10^23 atoms
then multiply each of the results from part B by 6.02 x 10^23 to find the number of atoms