: 1.) Ammonia and molecular oxygen are heated to produce nitric oxide and water

ID: 834400 • Letter: #

Question

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1.) Ammonia and molecular oxygen are heated to produce nitric oxide and water vapor. Write a balanced molecular equation.

2.) Calculate the number of moles of potassium chlorate which react with 0.750 mole of glucose.

KClO3 + C6H12O6 KCl + CO2 + H2O

3.) What Celsius temperature is needed to change the volume of a gas from 3,000 mL at 12.5o C to 4,200 mL? (R=0.08206 L-atm/mol-K)

4.) State the number of grams of water (H2O) that can be obtained by the reaction of 648.0 g of Ag with 252.0 g of HNO3.

3Ag (s) + 4 HNO3 (aq) 3AgNO3(aq) + NO(g) + 2H2O(l)

1.4NH3 + 5O2 = 4NO + 6H2O

2.C6H12O6 + 4 KClO3 = 6 CO2 + 4 KCl + 6 H2O

4 mol of KClO3 react with 1 mol of glucose

so 0.75 mol react with 4/0.75 = 5.333 mol of glucose

V1/T1 = V2/T2

3/(273+12.5) = 4.2/T

T = 399.7 K = 126.7 degree C

648/107.86 = 6 moles of Ag

252/63.1 = 3.994 moles of HNO3

6 moles * of Ag will react with 6*4/3 = 8 moles of HNO3 but there is only 3.994 moles present

So, HNO3 is limiting reagent

So 4 moles of HNO3 give 2mol of H2O

So 3.994 moles of HNO3 gives 1.9968 moles of H2O

So mass of H2O = 18 *1.9968 = 35.943 g

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