Fund E Evens

Fund E Evens - E.8 molar mass of CuSO4-5H20 = 249.68 g...

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Unformatted text preview: E.8 molar mass of CuSO4 -5H20 = 249.68 g ~mol'1 2950 g CuSO4 'SHZO lmol CuSO4 -5H20 lmol Cu 249.68 g CuSO4 .SHZO 1 mol CuSO4 -5HZO X[63.54 g Cu lmol Cu = 7.507 g Cu E.10 molar mass of sulfur 95.0 0.8 = — 31.97 - 1‘l + — 32.97 - 1‘1 [100% gm ) [100% gmo ) 4 2 + 4 33.97 - l—1 (1001 ( g m0 ) = 32.06 g.m01—‘ (30 gmol‘l to 1 SF) 15 6 EM (a) mass= ————————5'68X210 atoms _1 (200.59g-mol") ———1X10 ’Ug 6.022x10 atoms‘mol 1g = 1.89 ,ug _ _9 _1 1x106#g (b) mass— (7.924x10 mo1)(178.49 g-mol ) —*1— =1.414 ,ug g 6 (c) mass=(3.49 ymol) ——16—mOl—— (157.25g-mol'1) m 1x10 ,umol 1g = 549 ,ug 24 6 (d) maSS_ 6.29x2130 atoms 4 (121.75g'm0r1) 1x10 #8 6.022x10 atoms-mol 1g =1.27x109 ,ug E.16 (a) mpb_[ (b) me = [ 10.5x10—3 g Ag 107.87 g - mol‘1 Ag x M = 0.0333 ng lmol Pb x 2072 g Pb — 0.0202 g Pb lmol Pb 10.5x10‘3 g Zn 65.41 g - mol‘1 Zn E.18 (a) molar mass of H20 = 18.02 g - mol'l nH0_ 2.40kg 1 X 1000g “133mm 2 18.02g-mol' 1kg Nwater = (6.022 x 1023 molecule ' mol‘l) (133 mole) = 8.01 x 1025 molecules (b) molar mass ofbenzene = 78.11 g 5 mol—1 n = i1“;— moog =6.3><102mol 78.1lg-mol'1 1 kg = (6.022 ><1023 atoms - mol“)(6.3 ><102 mol) : 3.8 x 1026 molecules N benzene (0) molar mass of P atom = 30.97 g 5 mol“1 np = M =8.395 mol 30.97 g~mol NP = (6.022 x 1023 atom‘ morl) (8.395 mole) = 5.055 x 1024 molecules molar mass of P4 molecule = 123.88 g - mol—1 n = M =2.099mol P4 123.88g‘mol'l Np4 = (6.022 x 1023 molecule - morl) (2.099 mole) = 1.264 x 1024 P4 molecules ((1) molar mass of C02 = 44.01 g - mol—1 mm = fl—SLO—g—T =0.llmol Z 44.01g-mol~ NCOZ = (6.022 X 1023 atoms - mo1“‘)(0.1 1 mol) = 6.6 x 1022 molecules (6) molar mass ofNOz = 46.01 g ~ mol’1 5.0 g n = ————— N02 46.01 g-mol“ NNO = (6.022 ><1023 atoms - mol“)(0.1 1 mol) 2 6.6 ><1022 molecules =0.11mol E28 molar mass AuCl3 -2 H20 = 339.35 g - mol—1 1 mol AuCl3 -2 H20 339.35 g AuC13-2 H20 x 1 mol Au [196.67 g Au] 1 mol AuCl3 -2 H20 1 mol Au = 20.46 g mass Au = 35.35 g AuCl3 -2 H20[ ...
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This note was uploaded on 04/08/2008 for the course CHEM CHEM 6B taught by Professor Christinajohnson during the Fall '07 term at UCSD.

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Fund E Evens - E.8 molar mass of CuSO4-5H20 = 249.68 g...

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