How many atoms are in 1.14 mol of SO3 molecules?

Answer 1

Avogadro's number (6.022 x 10²³) tells how many atoms there are in 1 mole. To find how many are in 1.14 moles, multiply 6.022 x 10²³ and 1.14.

Since your "givens" contain 3 sig figs, you'll want to ensure your answer also has 3 sig figs so 6.87 x 10²³ atoms.