The thermite reaction is given by: Fe_2 O_3(s) + Al(s) rightarrow Fe(l) + Al_2 O

Question

The thermite reaction is given by: Fe_2 O_3(s) + Al(s) rightarrow Fe(l) + Al_2 O_3(s). How many grams of molten iron will be produced if 2.29 moles of iron (III) oxide is consumed? YOU MUST SHOW YOUR WORK ON ATTACHED SHEETS PLACE ANSWER HERE The Haber process for ammonia production is given by the balanced reaction: N_2(g) + 3H_2(g) rightarrow 2NH_3(g). How many grams of each reactant would be required to produce 3040 grams of product? YOU MUST SHOW YOUR WORK ON ATTACHED SHEETS PLACE ANSWER HERE (N_2) PLACE ANSWER HERE (H_2) Which of the following molecules is (are) polar? Carbon dioxide, carbon tetrafluoride, molecular chlorine, carbon monoxide, and CH_2 O.

Explanation / Answer

Q1.

Fe2O3 + Al = Fe + Al2O3

if

mol o Fe2O3 = 2.29 mol consume

ratio is 1 mol of Fe2O3 --> 1/2 mol of Fe

so

2.29 mol --> 1/2*2.29 = 1.145 mol of Fe(l) is produced

Q86

mass of reagents for 3040 g of product

mol of NH3 = mass/MW = 3040/17 = 178.823 mol of NH3 required

so..

N2 --> 1/2*178.823 = 89.4115 mol of N2

mass = mol*MW = 89.4115*28 = 2503.522 g of N2

and

H2 --> 2/3*178.823 = 119.215 = 2*119.215 = 238.43 g of H2

Q7

only CH2O is POLAR, all other are nonpolar

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