In chapter ATOMS AND MOLECULES (MCQ test 4, question number 10) i m facing problem because in that question i - Science - Atoms and Molecules

Question

In chapter ATOMS AND MOLECULES (MCQ test 4, question number 10) i m
facing problem because in that question i m not understanding that
why atoms are multiplied with molecules please help me facing a lot
of problem in mole concept and i request dont send me any kind of
link regarding this question because i need proper answer :-)

Geetha · Accepted Answer

Given mass of galactose = 0 8 g

Molecular mass of galactose
(C6H12O6) = (6 x 12 + 12 x 1 + 6 x
16 ) = 180 g mol-1
No of moles (n) = given mass in gmol mass = 0 8180 = 0 0044 molesn
= Number of moleculesAvagadro number Number of molecules = No of
moles × Avogadro number = 0 0044 × 6 023 × 1023 =
0 0267 × 1023 = 2 67 × 1021