What is the mass in grams of 0.0015 mol of aspirin, $C_9H_8O_4$ ,? How many aspirin molecules are there in this 0.0015 mol sample?

Question

13432 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-04-05T01:08:08

$"116.1 g"$ , $9.03 xx 10^20$ molecules

Find the molar mass of aspirin, $C_9H_8O_4$ ,

$9(12) + 8(1) + 4(16) = "180 g/mol"$

$0.0015 cancel("moles") xx "180 g"/(1cancel("mole")). = "116.1 g"$

Use Avogadro's number $6.02 xx 10^23$

$0.0015 cancel("moles") xx (6.02 xx 10^23"molecules")/(1cancel("mole")) = 9.03 xx 10^20"molecules"$

What is the mass in grams of 0.0015 mol of aspirin, C_9H_8O_4C_9H_8O_4,? How many aspirin molecules are there in this 0.0015 mol sample?