Exam 3

Question 1

What molecular orbital diagram do you use for O2 and F2?

Answer 1

pi bonds are above the sigma bond

Question 2

What molecular orbital diagram do you use for B2, C2, and N2?

Answer 2

The pi bonds are UNDER the sigma bond.

Question 3

What do you use to get the number of electrons of an individual atom/ion in a COMPLETE molecular orbital diagram?

Answer 3

total number of electrons

Question 4

When creating a molecular orbital diagram for a diatomic ion…

Answer 4

add/subtract the electron(s) to the TOTAL number of electrons in the molecule

Question 5

In a neutral substance, oxidation is…

Answer 5

zero

Question 6

For ions, the oxidation number…

Answer 6

is the charge of the ion.

Question 7

When H is combined with a more electronegative element, its oxidation number is…

Answer 7

+1

Question 8

When H is combined with a less electronegative element, its oxidation number is…

Answer 8

-1

Question 9

Elements in group 7 have an oxidation # of -1 when they are combined with…

Answer 9

a less electronegative element

Question 10

The LEAST electronegative element is assigned…

Answer 10

a positive oxidation number

Question 11

If the #mol and temperature are constant… (and what Law is this?)

Answer 11

pressure is inversely proportional to volume; Boyle’s Law

Question 12

When #mol and volume are constant…(what law is this?)

Answer 12

temperature is proportional to pressure; Amonton’s Law

Question 13

When #mol and pressure are constant… (what law is this?)

Answer 13

temperature is proportional to volume

Question 14

When temperature and pressure are constant… (what law is this?)

Answer 14

mol is proportional to volume; Avogadro’s Law

Question 15

When temperature and volume are constant…

Answer 15

pressure is proportional to #mol

Question 16

Boyle’s Law in terms of KMT? (think about what it is first)

Answer 16

P is inversely proportional to V

Compression of the container INCREASES the #collisions, which INCREASES pressure

Question 17

Amonton’s Law in terms of KMT? (think about what it is first)

Answer 17

T is proportional to P;

increase in temperature INCREASES velocity, which INCREASES KE, which INCREASES #collisions, which INCREASES pressure

Question 18

Charles’s Law in terms of KMT? (think about what the law is first)

Answer 18

T is proportional to volume;

increase in temperature INCREASES velocity, which INCREASES KE, which increases #collisions, which INCREASES volume.

Question 19

Avogadro’s Law in terms of KMT? (think about what the law is first)

Answer 19

mol is proportional to volume;

increase in #mol (amount of gas) INCREASES #collisions which INCREASES the volume

Question 20

If the force of a gas is GREATER than the force of atmospheric pressure in a manometer, how do you find the gas pressure?

Answer 20

ADD the amount of pressure (in mmHg) to the height

Question 21

If the force of gas is LESS than the force of atmospheric pressure in a manometer, how do you find the gas pressure?

Answer 21

amount of pressure (mmHg) subtracted by height

Question 22

1 atm =

Answer 22

760 torr

Question 23

How do convert degrees Celsius to Kelvin?

Answer 23

add 273.15 to the temperature measured in degrees Celsius

Question 24

What is the ideal gas law?

Answer 24

PV = nRT

Question 25

A solid has _____ shape and a ______ volume.

Answer 25

fixed, fixed

Question 26

A liquid has a _______ shape and a _______ volume.

Answer 26

variable, fixed

Question 27

A gas has a _______ shape and a ______ volume.

Answer 27

variable, variable

Question 28

When naming a polyatomic acid that consists of a polyatomic ion ending with -ate…

Answer 28

change the ending to -ic

Question 29

When naming a polyatomic acid that consists of a polyatomic ion ending with -ite…

Answer 29

change the ending to -ous

Question 30

Per -ate ions have…

Answer 30

one MORE oxygen than the -ate ions

Question 31

-ite ions have…

Answer 31

one LESS oxygen than the -ate ion

Question 32

hypo -ite ions have…

Answer 32

TWO LESS oxygens than the -ate ions

Question 33

What is the vapor pressure of water?

Answer 33

23.8 Torr

Question 34

What is the trend for metallic character on the periodic table?

Answer 34

increase down a group, decrease across a period