Chemistry

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How many atoms are there in 6.90 moles of sulfur (S)?

Calculate the molar mass of a compound if 0.411 mole of it has a mass of 185 g.

Know of any good sites that help answer these ?
Or information on how to?

• Chemistry -

(a) Multiply the number of moles by 6.02x10^23 atoms/ mole.

(b) If you divide grams by moles you get grams/mole, the atomic mass.

• Chemistry -

Correction:
(b) If you divide grams by moles you get grams/mole, the molar mass.

Comment: No web page makes a good substitute for your chemistry class and your chemistry textbook.

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