Chemistry

Chemistry, 01.09.2019 03:00, jcross11nate

How many molecules of oxygen gas are in 1.42 moles of oxygen gas ?

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85 points asap 1. how many molecules are in 7.5 grams of oxygen gas? 2. 2hgo(s) --> 2hg(l) + o2 (g) in a certain reaction 4.37 of hgo is decomposed, producing 2.5 of hg what is the percent yield for the reaction? 3. 4 fe(s) + 3o2(g) --> 2fe2o3(g) in a certain reaction, 27.3 g of iron is reacted with 79.9 g of oxygen how many grams of the excess reactant remain after the reaction is complete? 4. how many moles are in 10.25 grams of nh3? 5. what is the empirical formula mass (efm) of p2o5? 6. how many molecules are in 1.84 moles of water? 7. 4 fe(s) + 3o2(g) --> 2fe2o3(g) in certain reaction, 27.3 g of iron is reacted with 45.8 g of oxygen. what is the limiting reactant? 8. how many moles are in 2.62 x 1023 molecules of c6h14? 9. fe2o3(s)+3co(g)⟶2fe(s)+3co2(g) how many moles of co are required to completely react with 1.225 moles of fe2o3? 10. how many moles are there in 1.3 x 1024 atoms of barium? 11. how many carbon atoms are present in 0.52 moles of c2h6o? 12. a compound has a chemical composition of 51% carbon, 9.3% hydrogen, and 39.2% oxygen. what is the empirical formula?

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