Final Exam Name (print leglly) Chem 1303.004 Geseral Chrmitry May 2017 1. loon h

Question

Final Exam Name (print leglly) Chem 1303.004 Geseral Chrmitry May 2017 1. loon has a density of 7,87 plemi. What mass of inon would be required to cover foothull pleying surface of 120 yds x 60 yla to a depth of 1.0 mm? (1 inch-2.54 cm1 b 4536 E 1 yard-3 feet1 foot 12 inches) 2. An aom of the isotope aBa consists of how many protonss (p), neutrons (n), and electrons (e)? A) 56 p. 137 m, 56 D) 56 p,56 n, 56 e B) 56 p 81 n, 56 )137 p, 81 , 56e E) 81 p, 56m 81 e 3. The formula for celciom phosphate is L. A poild wire has a diamcter of 1.00 mm. What ength of this wire cootains exatly 1.00 A) 2630 mB)3.69m )25I m D) 145m 627m S. A 1.375 sample of mannitol, a sugar found in seaweed, is burned completely in oxype mole of gold? (density od Au-17.0g/m' to give 1.993 g of carbon dioxide and 0.9519 g of water. The empirical Sormula od mannitol is 6. Ammonia neacts with oxygen to foem nitric oside and water vapor When 40 0 g NHb and 50.0g Os are allowed to react, which is the limiting reagent? A) NH B) NO D)HO E)No reagent is limiting

Explanation / Answer

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Question 3

The formula for Calcium Phosphate is Ca3(PO4)2

Question 6

Balanced equation:
4 NH3 + 5 O2 ===> 4 NO + 6 H2O
Reaction type: double replacement

40 gm NH3 = 40 /17 =  2.348 Moles

50 gm of O2 = 50 /32 =  1.562 Moles

1.562 Moles of O2 needs only 1.25 Moles of NH3. Hence limiting reagent is Oxygen

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