Question

42g of sucrose are dissolved in 18g of water in a beaker. Find the number of oxygen atoms present in the solution

Answer 1

Answer:

Explanation:molar mass of sucrose=342

No moles of sucrose=42/342

0.125

1 mole of sucrose has 11 moles of O atom

18g H2O=1 mole H2

1 mole ofH2O has 1 mole of O atom

Total no moles of O atom=1+0.125=1.125 moles

Total no of O atom=6.022×10^23×1.125

=6.789× 10^23