The answers are E A D B can you please show the work on why? 1) A reaction which

Question

The answers are E A D B can you please show the work on why?

1) A reaction which produces crude iron from iron ore is shown below 1) Fe2O3 (s) + 3 CO (g) _ 2 Fe (s) + 3 CO2 (g) How many moles of iron could be produced from the reaction of 10 mol Fe2O3 and 25 mol of CO? A) 25 B) 35 C) 10 D) 37.5 E) 17 2) How many grams of Li3N can be formed from 1.75 moles of Li? Assume an excess of nitrogen. 2) 6 Li(s) + N2(g) - 2 Li3N(s) A) 20.3 g Li3N B) 61.0 g Li3N C) 58.3 g Li3N D) 15.1 g Li3N E) 18.3 g Li3N 3) In the reaction Cu (s)2Ag (a Cu2* (aq) - 2 Ag (s). the reducing agent (if any) is 3) A) Cu2+ B) Ag C) Ag. D) Cu. E) none of these (not a redox reaction) 4) Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of K2S and 4) Fe(NO3)2 are mixed. A) Fe2t(aq)+S2-(aq)+2 Kt(aq) 2 NO3-(aq) Fes(s 2 K*(a) 2 NO3-(aq) B) Fe2+(aq)+s2-(aq) FeS(s) C) K (a)+NO3 (aq) KNO3(s) D) Fe2+(aq)+ S2-(aq)+ 2 Kt(aq) 2 NO3-(aq) Fe2+(aq)+S2-(aq)+2 KNO3(s) E) No reaction occurs.

Explanation / Answer

1)

we have the Balanced chemical equation as:

Fe2O3 + 3 CO ---> 2 Fe + 3 CO2

1 mol of Fe2O3 reacts with 3 mol of CO

for 10 mol of Fe2O3, 30 mol of CO is required

But we have 25 mol of CO

so, CO is limiting reagent

we will use CO in further calculation

Molar mass of Fe = 55.85 g/mol

From balanced chemical reaction, we see that

when 3 mol of CO reacts, 2 mol of Fe is formed

mol of Fe formed = (2/3)* moles of CO

= (2/3)*25

= 17 mol

Answer: E

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