volume of 500 ml, what is th 1s) Ir4.89 g of ZnCl2 is dissolved in enough water

Question

volume of 500 ml, what is th 1s) Ir4.89 g of ZnCl2 is dissolved in enough water to give a total solution? a. 0.217 NM b. 1.33 M c. 0.0179 M d. 0.849 M 0.0717 M 16) Give the complete ionic equation for the reaction if any) that occurs when aqueous solutions of lithium sulfide a. 2uya) + s2-rag) + Cu2+(ag) + 2 NO3-(aq) Cu2+(aq) + S2-(ag) + 2 LAO3(s) b. 2ur(ag) + S2-fag) + Cu2+(ag) + 2 NO3Tag) Cusw + 2 Li+(aq) + 2 Nos-(aq) e Liag+S tag)+ Cu (ag)+NO3 (og) Cu)+LINOslag) d. Li+(ag) + SO42-(aq) + ar(ag) + NO3-(ag) CuS(s) + Li+(aq) + NO3"(aq) e. No reaction occurs. and copper (I) nitrate are mixed. 17) Determine the oxidizing agent in the following reaction Nirs) + 2 Agci04(ag) Ni(C104)2(ag) + 2 Agrs) c. Ag d. Ni(s) e. This is not an oxidation-reduction reaction. o produce CS2) and 8) How much heat is absorbed when 45.00 g of C(s) reacts in the presence of excess SO2( COlg) according to the following chemical equation? 5C(i) + 2 SO2(g) CS2() + 4 CO(g) r-239.9 kJ a. 2158 k b. 239.9 kJ c. 898.5 kJ d. 179.8 k

Explanation / Answer

Q15

m = 4.89 g of ZnCl2

MW of ZnCl2 = 136.286 g/mol

mol = mass/MW = 4.89/136.286 = 0.03588 mol

V = 500 mL = 0.5 L

[ZnCl2] = mol/V = 0.03588/0.5 = 0.07176 M

choose E

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