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1. How many grams of O are there in a sample of O that contains the...

1. How many grams of O are there in a sample of O that contains the same number of moles as a 55.4 gram sample of Kr?

2. How many MOLECULES of nitrogen dioxide are present in 3.28 grams of this compound

3. . How many GRAMS of nitrogen dioxide are present in 7.63×1022 molecules of this compound

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Answer #1

mars moles of Kr molar mavs 55.4 Tram 83.798 Trm/mo) mol Kt 0-661 Moles moles of Oxan of o) (amoles of o)x mu/ar maM X W 16 722 7.63 moles of NO 1-267 10 1 6.022 x t0 23 O./267 mol NO of CmoLar man man NO X 0.1267 mol) (46 7m/mol) 5.828 ra 5.83 ram N

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