Question

how many atoms are there altogether in a molecule of sodium sulfate

Answer 1

Answer:

1 molecule of Na2SO4 contains 2 atoms of Na, 1 atom of sulfur and 4 atoms of oxygen.

So, 1 molecule of Na2SO4 contains (2+4+1=7) atoms

1 mole of Na2SO4 contains 7 moles of atoms.

Molecular weight of Na2SO4 is (2*23)+(1*32)+(4*16) = 46+32+64 = 142 grams.

142 grams of Na2SO4 contains 7 moles of atoms.

23.5 grams contains (23.5/142)*7 moles = 1.16 moles

1 mole contains avagadro number of atoms = 6.023*(10^23)

So, total number of atoms in 23.5 grams of Na2SO4 is 1.16*6.023*(10^23)=6.99*(10^23) atoms.

PLEASE MARK THIS AS BRAINLIST