If you have 200 grams of SO4, how many molecules of SO4 will you have?

1.25x10^24 molecules

Explanation:

1 mole of any substance contains 6.02x10^23 molecules.

Therefore, 1mole of SO4 also contains 6.02x10^23 molecules.

1mole of SO4 = 32 + (16x4) = 32 + 64 = 96g

If 1mole (i. e 96g) of SO4 contains 6.02x10^23 molecules,

Therefore 200g of SO4 will contain = (200 x 6.02x10^23) / 96

= 1.25x10^24 molecules

2.08 moles

Explanation:

number of molecules = mass / molecular mass of SO₄

number of molecules = 200 g / 96.06 g/mol

number of molecules ≈ 2.08