Question

A sample of table sugar has a mass of 5.432g a) calculate the number of moles in the sample

B) calculate the number of moles carbon, moles hidrogen, moles oxygen
C)calculate the number of atoms of carbon, moles of hydrogen, moles of oxygen

Answer 1

The number of particles of atoms depends on the ratio of their composition in the compound

Further explanation

Given

5.432 g of table sugar

Required

moles of sample

moles of C, H and O

number of atoms

Solution

Table sugar : Sucrose : C₁₂H₂₂O₁₁

• moles of sample :

= 5.432 : 342,3 g/mol

= 0.016

• moles of C, H, and O :

C = 12 x 0.016 = 0.192

H = 22 x 0.016 = 0.352

O = 11 x 0.016 = 0.176

• number of atoms :

C = 0.192 x 6.02 x 10²³ = 1.16 x 10²³

H = 0.352 x 6.02 x 10²³ = 2.12 x 10²³

O = 0.176 x 6.02 x 10²³ = 1.06 x 10²³