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Practice Exam 1 - Practice Exam 1 1 How many grams of...

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Practice Exam 1 1) How many grams of hydrogen are in 46 g of CH 4 O? A) 5.8 B) 1.5 C) 2.8 D) 0.36 E) 184 2) Iron pentacarbonyl (Fe(CO) 5 ) reacts with phosphorous trifluoride (PF 3 ) and hydrogen, releasing carbon monoxide: Fe(CO) 5 + 2PF 3 + H 2 ° Fe(CO) 2 (PF 3 ) 2 (H) 2 + 3CO The reaction of 5.0 mol of Fe(CO) 5 , 8.0 mol of PF 3 and 6.0 mol of H 2 will release __________ mol of CO. 3) Which of the following compounds would you expect to be ionic? 4) Which species below is the nitride ion? 5) For which of the following can the composition vary? A) pure substance B) element C) both homogeneous and heterogeneous mixtures D) homogeneous mixture E) heterogeneous mixture
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6) Which species has 54 electrons? 7) Which of the following are strong electrolytes? 1) HCl 2) HC 2 H 3 O 2 3) NH 3 4) KCl
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