4.8 - 62 g. You could then figure out how much one mole of...

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Key for Micro Exam 4 Question 8 Question 8: (Try this problem without a calculator) 0.10 mol of a compound with the empirical formula CH 3 O weighs 6.2 g. The molecular formula of the compound is Answers: (a) CH 3 O (b) CH 3 O 2 (c) CH 6 O (d) C 2 H 3 O (e) CH 6 O 2 (f) C 2 H 6 O 2 Remember that the actual molecular formula is a multiple of the empirical formula. One way to solve this problem is to realize that since 0.1 moles weighs 6.2 g, then 1 mol weighs
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Unformatted text preview: 62 g. You could then figure out how much one mole of CH 3 O weighs. It weighs 31g. Since you know that the molecular formula is a multiple of the empirical formula, you could determine which multiple of 31 is equal to 62. Well, thats obviously 2. The molecular formula must therefore be double the empirical formula or C 2 H 6 O 2....
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