Question

A sample of table sugar (sucrose c12h22o11) has a mass of 3.115 g

Answer 1

Hey there:

a) atomic mass:

Carbon =12.0107 g/mol

Hydrogen = 1.00794 g/mol

Oxygen =  15.9994 g/mol

Therefore:


C12H22O11 = 


12 * 12.0107 + 1 * 1.00794 + 16 * 15.9994 => 342.29648 g/mol

__________________________________________________________


b) number of moles:

n = m / mm

n = 3.115 / 342.29648 

n = 0.0091 moles

________________________________________________

hope this helps!