Question

How many moles are in 1.51 x 1015 molecules of Sulfuric Acid?

Answer 1

Given,

1 mole of Sulfuric Acid contains 6.022*10²³ molecules.

Given molecules = 1.51*10¹⁵

No. of moles = (1.51/6.022) * 10¹⁵⁻²³

= 0.25*10⁻⁸ moles

I hope this helps.