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Midterm Review

Total questions: 59

Worksheet time: 5hrs 55mins

Name
Class
Date
1.

The word family implies that the elements in a family have like properties. What property do the elements of the noble gas family all share?

a)

They are not reactive

b)

They are very reactive

c)

They are found in the earth's atmosphere

d)

They react readily with oxygen in the air

2.

What is the GFM of PbSO4

a)
303.3 g/mol
b)
294.7g/mol
c)
163.8g/mol
d)
372g/mol
3.
What is the empirical formula for the following molecular formula: C6H14
a)
C6H14
b)
C3H7
c)
CH2
d)
CH3
4.
What is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g.
a)
K2SO4 
b)
K8SO16
c)
K8S4O8 
d)
K8S4O16 
5.
When reacting Na with Cl2, we calculated that the theoretical yield should be 12.5 grams. Our actual yield was 13.0 grams. What is the percent yield?
a)
100%
b)
104%
c)
96%
d)
1.04
6.

What is the percent composition by mass of sulfur (S) in the compound MgSO4?

a)

20.22%

b)

19.85%

c)

26.64%

d)

28.64%

7.

How many molecules are in 2.5 mol of NaCl?

a)

1.50 x1024 molecules

b)

1.50 molecules

c)

4.15 molecules

d)

1.51 x1024 molecules

8.

How many moles are in 19.82 g Mg?

a)

1.23 mol Mg

b)

481.70 mol Mg

c)

1.00 mol Mg

d)

0.82 mol Mg

9.

Determine the mass of 4.20 moles of C6H12

a)

354 g

b)

84 g

c)

337 g

d)

421 g

10.

CH4 + 2O2 → CO2 + 2H2O

24 grams of CH4 was added to the above reaction. Calculate the theoretical yield of CO2.

a)

66 grams CO2

b)

132 grams CO2

c)

33 grams CO2

d)

8.72 grams CO2

11.

For the reaction represented by the equation Cl2 + 2KBr → Br2 + 2KCl, how many grams of potassium chloride (KCl) can be produced from 356 grams potassium bromide (KBr)?

a)

749 g

b)

223 g

c)

479 g

d)

814 g

12.

What is the empirical formula of a compound containing 18.7% of Lithium, 16.3% of Carbon, and 65.0% of Oxygen?

a)

CO2Li3

b)

Li2CO3

c)

Li3CO2

d)

LiCO5

13.

What are 3 examples of metals:

a)

Lithium

Sodium

Calcium

b)

Nitrogen

Oxygen

Fluorine

c)

Helium

Neon

Argon

14.

What is the correct Lewis dot structure for Selenium:

a)
b)
c)
15.

What is the correct name for Cu(NO3)2?

a)

Copper (II) Nitrate

b)

Copper Nitrate

c)

Copper (III) Nitrate

16.

A substance that is tightly packed together is most likely in what state of matter?

a)

solid

b)

liquid

c)

gas

17.
A change that alters the physical properties of a substance without changing its composition.
a)
Physical Change
b)
Chemical Change
18.
Water freezing into ice is an example of a...
a)
Physical Change
b)
Chemical Change
19.
Physical or Chemical Change?  Iron rusts
a)
Physical Change
b)
Chemical Change
20.
How many sig. fig. are in the number below:
350.540
a)
4
b)
5
c)
6
d)
7
21.
Which measurement contains 3 sig figs?
a)
200 mL
b)
20.0 mL
c)
0.02 mL
d)
0.020mL
22.
Round 1047.78 to three sig figs
a)
104
b)
105
c)
1050
d)
1050.00
23.
Describe the accuracy and precision of the image
a)
Accurate and Precise
b)
Accurate and not precise
c)
Not Accurate and Precise
d)
not accurate and not precise
24.
Solve. Round using SigFig math rules.
98.7°C - 97.25°C 
a)
1°C
b)
1.4°C
c)
1.45°C
d)
1.450°C
25.
What is the volume of Object X?
a)
10.0 cm3
b)
15.0 cm3
c)
20.0 cm3
d)
25.0 cm3
26.
What is the density of a rock if its mass is 36g and its volume is 12.0 cm3? (All calculations should have the correct sig figs)
a)
432 g/cm3
b)
0.33 g/cm3
c)
48 g/cm3
d)
3.0 g/cm3
27.
You know 1000 mg = 1 g.  Convert 2.5 grams into milligrams.
a)
25 mg
b)
25,000 mg
c)
250 mg
d)
2500 mg
28.
What is this element...Au
a)
Iron
b)
Titanium
c)
Gold
d)
Flourine
29.
Element:Fe
a)
Gold
b)
Flourine
c)
Phosphorus
d)
Iron
30.
If I gain electrons I become
a)

positive because I've become an anion

b)

negative because I've become an anion

c)

neutral because I've become balanced

d)

neutral because I've become a cation

31.
When metals bond with non-metals they form what type of bonds
a)
covalent
b)
ionic
c)
cooperative
d)
lewis
32.

What is the formula for the compound created when Na1+  F1- bond?        

a)
NaF
b)
NaF3
c)
Na3F
d)
Na1F2
33.

What is the formula for the compound created when Cr3+  O2- bond?          

a)
CrO
b)
Cr3O2
c)
Cr2O3
d)
CrO3
34.

What is the name of AgF?

a)
silver fluoride
b)
silver fluorine
c)
monosilver monofluoride
d)
silver monofluorine
35.

What is the formula for phosphorus trichloride?

a)
KCl3
b)
PCl3
c)
K3Cl
d)
P3Cl
36.

What is the formula for silicon dioxide?

a)
SO2
b)
NaO2
c)
SiO2
d)
SiO
37.
A mixture that appears to be evenly mixed throughout:
a)
an atom
b)
a compound
c)
a homogeneous mixture
d)
a heterogeneous mixture
38.
A pure substance...
a)
is an element or a compound
b)
is an element or a mixture
c)
is a compound or a mixture
d)
is a mixture
39.

A substance made up of two or more chemically combined elements is

a)
an element
b)
mixture
c)
compound
d)
solution
40.

Two or more physically combined substances form

a)
a compoud
b)
an acid
c)
an element
d)
a mixture
41.
Example for physical property
a)
odor
b)
burns in air
c)
reacts with water to create hydrogen gas
d)
rust
42.
Example for chemical property
a)
malleability
b)
texture
c)
combustion
d)
sour taste
43.
How many electrons should Lithium have around its Lewis dot model?
a)
1
b)
2
c)
3
d)
4
44.
How many electrons should Beryllium have around its Lewis dot model?
a)
1
b)
2
c)
3
d)
4
45.
What is 9.3 x 10-3 in standard form? 
a)
.093
b)
.0093
c)
.00093
d)
.000093
46.
How would you write 564,000,000 in scientific notation?
a)
5.64 x 10-7
b)
5.64 x 106
c)
5.64 x 108
d)
56.4 x 107
47.
Which properties are characteristic of the Group 1 metals?
a)
high reactivity and the formation of unstable compounds
b)
low reactivity and the formation of unstable compounds
c)
high reactivity and the formation of stable compounds
d)
low reactivity and the formation of stable compounds
48.

What is the GFM of NaCl?

a)
58.45g/mol
b)
28g/mol
c)
12g/mol
d)

6.02 x 1023 g/mol

49.

In chemistry, a mole is

a)
The mass of an atom
b)
a large number used to count particles
c)
based on the volume of a substance
50.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
51.
What law governs the balancing of chemical equations? 
a)
Law of Energy
b)
Law of Conservation of Matter/Mass
c)
Law of Gravity
d)
Law of Matter Movement 
52.

What is a cation's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element

53.

What is the charge of phosphate?

a)

-3

b)

-2

c)

-1

d)

-4

54.

What is an anion's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element's charge

55.

Which of the following is a heterogeneous mixture?

a)

gravel and water

b)

sugar and water

c)

powdered milk and water

d)

powdered coffee and water

56.

When naming a transition metal ion that can have more than one oxidation number, the numerical value of the charge is indicated by

a)

prefix

b)

Roman numeral following the name

c)

suffix

d)

superscript after the name

57.

What is the correct name for the following compound?

Li2S

a)

Dilithium monosulfide

b)

Lithium disulfide

c)

Sulfuric lithate

d)

Lithium sulfide

58.

Give the formula for phosphorus trifluoride

a)

P3F

b)

PF

c)

PF3

d)

P3F3

59.

Which of the following would produce an anion?

a)

Ca

b)

Al

c)

K

d)

F

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