AP Chemistry Exam 2!!! more fun!?

Question

1. Ammonium Nitrate combines with molecular oxygen to form water vapor, Nitrogen Monoxide and Nitrogen Dioxide. What is the mole ratio of Ammonium Nitrate to water vapor

a. 2 to 1

b. 5 to 2

c. 1 to 1

d. 3 to 2

2. How does the diameter of a cation compare with that of the neutral atom from which it was formed.

a. The diameter of the cation is always larger than that of the neutral atom.

b. The diameter of the cation is always smaller than that of the neutral atom.

c. They are both the same

3. Atoms like to 'mimic' the electron configuration of the noble gas which either directly precedes it (in the case of a metal) or that occurs directly after (it in the case of a nonmetal) on the periodic table. Atoms of all of the follow elements will 'mimic' the electron configuration of Krypton except for which of the following:

a. Iodine (I)

b. Strontium (Sr)

c. Selenium (Se)

d. Bromine (Br)

Answer 1

1. Ammonium Nitrate combines with molecular oxygen to form water vapor, Nitrogen Monoxide and Nitrogen Dioxide. What is the mole ratio of Ammonium Nitrate to water vapor

NH4NO3 & O2 --> NO  & NO2  &2 H2O

a. 2 to 1 (sort of) it is really 1Ammonium Nitrate to2 water vapor.... 1:2)

2. How does the diameter of a cation compare with that of the neutral atom from which it was formed.

b. The diameter of the cation is always smaller than that of the neutral atom.

3. Atoms like to 'mimic' the electron configuration of the noble gas which either directly precedes it (in the case of a metal) or that occurs directly after (it in the case of a nonmetal) on the periodic table. Atoms of all of the follow elements will 'mimic' the electron configuration of Krypton except for which of the following:

a. Iodine (I)