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Answer:
5.96 * 10^23 molecules
Explanation:
Don't start counting up the number of CsHsNs and Os there are Counting up the atom ions will get a wrong answer. The question is asking for the number of molecules. That means you do not break down each molecule to find the number of molecules. You modify 1 mol to find out how many molecules are in 0.99 mols. Do that using a proportion.
1 mol contains 6.01 * 10^23 molecules
0.99 mol contains x
1/0.99 = 6.02 * 10^23 / x molecules
x = 0.99 * 6.02 * 10^23
x = 5.96 * 10^23