VINCENT

Wang Chemistry Review question semester1

10 moles of N2 reacts with 18 grams of H2 in

____N2+_____H2-—>_____NH3

N=14

H=1

A)    Write the electron configuration and the quantum number of the last electron of all elements involved in this reaction.

B)     Draw the Lewis-dot diagram and VESPR model of all molecules involved in this reaction. Also state the molecular shape and polarity.

C)     Find the percent composition of all the elements in the product.

D)    Find the limiting reagent.

E)     What is the excess and its excess amount in moles, grams, and number?

F)      How much NH3 will be produced in this reaction? Express the amount in kg, g, dg, cg, mg, µg, ng, and lb. (1 lb=0.45kg)

Answers

A)    N: 1s1 2s2 2p3                        n=2 L=0 ml=0 ms=+1/2

H: 1s1                          n=1 L=0 ml=0 ms=+1/2

B)     LDD

H-H                           

VESPR

H-H                          

Name

Linear                          Linear                          Triangular pyramid

Polarity

Non-polar                    Non-polar                    Polar

C)     N= 82.35%      H= 17.65%

D)    H2 is the limiting reagent

E)     N2 is the excess. Excess by 7 moles, 168g = 1.12e-22 (all values are equal and e means 10^)

F)      1.02e-1 kg

1.02e2 g

1.02e3 dg

1.02e4 cg

1.02e5 mg

1.02e6 µg

1.02e12 ng

2.27e-1 lb