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Review for Chemistry Final

Total questions: 50

Worksheet time: 2hrs 5mins

Name
Class
Date
1.

What type of reaction always releases energy?

a)

endothermic

b)

exothermic

c)

decompostion

d)

oxidation-reduction

2.

When two fluorine atoms share a pair of electrons, the bond that forms is a(n)

a)

polar covalent bond

b)

ionic bond

c)

nonpolar covalent bond

d)

double bond

3.

Elements that have the same number of valence elections are

a)

in the same period

b)

in the same group

c)

called noble gases

d)

called transition metals

4.
You have a gas that has a pressure of 2 ATM and a volume of 10L.  What would be the new volume if the pressure was changed to 1 ATM?
a)
5 L
b)
20 L
c)
It would stay at 10L
d)
1 L
5.
Determine the initial temperature of a random gas when the initial volume is 2.2 L and it is cooled to 88K with a volume of 0.85 L. 
a)
0.029 K
b)
0.021 K
c)
227.76 K
d)
34 K
6.
Consider a sample of oxygen gas at 27° C with a volume of 9.55L at a pressure if 2.97 atm.  The pressure is changed to 8.25 atm and the gas is heated to 125° C.  What’s the new volume? 
a)
4.56 L
b)
4.6 L
c)
15.9 L
d)
16 L
7.
How much energy is required to completely boil away 150g of 10o C water? Use C = 4.184 J/goC for water, and Hv = 2260 J/g.
a)
56,484 J
b)
339,000 J
c)
395,484 J
d)
385,484 J
8.

The Law of __________________ states that energy cannot be created or destroyed, but only changed from one form to another.

a)

Energy Production

b)

First Energy

c)

Conservation of Resources

d)

Conservation of Energy

9.

100 Celsius is ? Kelvin (K = Celsius + 273)

a)

173 K

b)

373K

c)

273 K

d)

0 K

10.

At higher temperatures

a)

particles in an object have less kinetic energy

b)

particles in an object move faster

c)

a gas contracts

11.
Convert 300 K to oC
a)
27oC
b)
0oC
c)
-27oC
d)
573oC
12.

Convert -89 oC to K

a)

184K

b)

362K

c)

-362K

d)

-184K

13.

If I have 5.6 liters of gas in a piston at a pressure of 1.5 atm and compress the gas until its volume is 4.8 L, what will the new pressure inside the piston be?

a)

1.8 atm

b)

3.27 atm

c)

1.8 L

d)

3.27 atm

14.

Oxygen gas is at a temperature of 40oC when it occupies a volume of 2.3 liters. To what temperature should it be raised to occupy a volume of 6.5 liters?

a)

611.84oC

b)

611.84 K

c)

880.33 K

d)

880.33oC

15.
A gas is heated from 263K to 298K. The volume is increased from 24.0L to 35.0L. If the original pressure was 1.00 atm, what is the new pressure?
a)
0.78 atm
b)
1.65 atm
c)
1.28 atm
d)
0.61 atm
16.
How many protons does Fluorine-19 contain?
a)
9
b)
19
c)
10
17.
How many neutrons does the isotope below have?     89 36Kr
a)
53
b)
36
c)
89
d)
125
18.

An atom of silicon has 14 protons and 15 neutrons. What is the mass number of this atom of silicon?

a)

14

b)

15

c)

29

d)

28.085

19.

what is the name of group number 1

a)

halogens

b)

noble gases

c)

alkali

d)

alkaline earth

20.

what group number are the halogens

a)

18

b)

1

c)

2

d)

17

21.

what group number are the noble gases

a)

17

b)

18

c)

14

d)

15

22.
24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?
a)
74.92 amu
b)
24.97 amu
c)
75.01 amu
d)
74.51 amu
23.
An element has three different isotopes. One has a mass of 35.00 amu; another has a mass of 36.00  amu; and another has a mass of 38.00  amu. What is the average atomic mass of this element?
a)
36.33 amu
b)
37.00 amu
c)
12.11 amu
d)
impossible to tell
24.
An isotope has three forms.  30% have a mass of 4 amu, 20% have a mass of 5 amu and 50% have a mass of 3 amu.  Average atomic mass will be closest to
a)
2 amu
b)
3 amu
c)
4 amu
d)
5 amu
25.
How many valence electrons does a bromine atom have?
a)
1
b)
2
c)
6
d)
7
26.
When metals bond with non-metals they form what type of bonds
a)
covalent
b)
ionic
c)
cooperative
d)
lewis
27.
How many valence electrons does nitrogen have?
a)
3
b)

2

c)
5
d)
1
28.
How many valence electrons does hydrogen have?
a)
3
b)
2
c)
5
d)
1
29.
Where are the non-metals located on the periodic table?
a)
All over
b)
On the left side of the "staircase"
c)
On the right side of the "staircase"
30.
A covalent bond involves a __________ of electrons.
a)
sharing
b)
borrowing
c)
exchanging
d)
switching
31.

Use your knowledge and electronegativity sheet to predict what the following compound is classified as.

a)

polar covalent

b)

nonpolar covalent

c)

ionic

d)

metallic

32.
If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.
a)
1.25mg
b)
1.25g
c)
10g
d)
10mg
33.

After 22,800 years, approximately what percentage of the original carbon-14 remains?

a)

15%

b)

12.5%

c)

6.25%

d)

3.125%

34.
If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?
a)
1 half-life
b)
2 half-lives
c)
3 half-lives
d)
4 half-lives
35.
After 4 half-lives, 1g of a sample of Krypton-85 remains unchanged.  What was the original mass of the sample?
a)
16g
b)
32g
c)
0.0625g
d)
4g
36.
Solve this equation for alpha decay.
85209At = ___ + 24He
a)
83205Bi
b)
86209Rn
c)
81207Tl
d)
85208At
37.
Solve this equation for alpha decay.
85209At = ___ + 24He
a)
83205Bi
b)
86209Rn
c)
81207Tl
d)
85208At
38.
The term "neutral" means
a)
having only a little bit of charge
b)
having a positive charge
c)
having a negative charge
d)
having no charge at all
39.

Correct statement is

a)

Gases at low pressure or high temperature behave as an ideal gas

b)

Gases at high pressure or low temperature behave as an ideal gas

c)

Gases at high density behave as an ideal gas

d)

None of the mentioned

40.
How many valence electrons in this structure?
a)
6
b)
5
c)
4
d)
7
41.

How many protons does potassium have?

a)

15

b)

16

c)

19

d)

20

42.

Elements in the same group share the same number of:

a)

electrons

b)

valence electrons

c)

electron shells/orbits

d)

protons

43.

Noble gases are not reactive because:

a)

they have 8 valence electrons

b)

they are all gases

c)

they're at the top of the periodic table

d)

they're non- metals

44.

Which element could have the following electron dot symbol?

a)

Boron

b)

Carbon

c)

nitrogen

d)

oxygen

45.

Atoms are "happy" when their outermost layer of electrons is full. How many electrons does the outermost layer hold?

a)

2

b)

6

c)

8

d)

18

46.

This Bohr model shows an atom of which element?

a)

Beryllium

b)

helium

c)

carbon

d)

oxygen

47.

Covalent bonds form between

a)

two metals

b)

metal and non-metal

c)

two non metals

d)

it varies

48.

Ionic bonds form between:

a)

two metals

b)

metal and non-metal

c)

two non metals

d)

it varies

49.

Convert 10 C to K

a)

10 Because Celsius and Kelvin are the same

b)

-263

c)

263

d)

283

50.

Convert 10 K to C

a)

10 Because Celsius and Kelvin are the same

b)

-263

c)

263

d)

283

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