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Chapter two Flashcards

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1
Q

How many significant figures are in the following measurement?

0.01400 g/mL

Question 1 options:

2

3

4

5

6

A

4

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2
Q

How many pure substances are present in a sample that contains ethanol (C2H5OH) and liquid water (H2O)?

Question 2 options:

0

2

4

12

A

2

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3
Q

Complete the following conversion between SI Units.

781 mL= ??? L

Question 3 options:

78100000

7.81

78100

0.781

A

0.781

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4
Q

A car drives at a speed of 48.0 miles per hour. What was the car’s speed in meters per second?

1 mile = 1609.3 meters

A

21.5

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5
Q

Matter consists of tiny particles that can combine in specific ratios to form substances with specific properties. This statement is most similar to a scientific .

Question 5 options:

Law

Theory

Hypothesis

A

theory

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6
Q

In a chemical reaction 48.5 grams of iron react with oxygen to form 99.4 grams of a compound that contains iron and oxygen atoms.

How many grams of oxygen reacted?

A

50.9 grams oxygen

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7
Q

Exactly one pound of bread dough is placed in a baking tin. The dough is cooked in an oven at 350 °F releasing a wonderful aroma of freshly baked bread during the cooking process. How does the mass of the bread after cooking compare with the initial mass?

Question 7 options:

Increases

Decreases

Remains the Same

A

Decreases

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8
Q

A certain compound was found to contain 24.27 grams of carbon and 1.87 grams of hydrogen. If a sample of this compound contains 11.06 grams of hydrogen, how many grams of carbon does the sample contain?

A

144 g

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9
Q

A material has a mass of 16.00 grams and a volume of 12.1 mL, what is the density of the material?

A

1.32

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10
Q

A student makes two pure compounds in the lab. Compound A is found to contain 12 grams of carbon and 4 grams of hydrogen. Compound B is found to contain 12 grams of carbon and 2 grams of hydrogen. According to Dalton’s Law of Definite Proportions could these two compounds be the same molecule?

Question 10 options:

Yes

No

Not Enough Information is Given to Answer the Question

A

no

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11
Q

A chemist makes a pure compound that contains 4 grams of hydrogen and 48 grams of carbon. Later the chemist makes a second sample of the same pure compound but this time it contains 8 grams of hydrogen. How many grams of carbon does the second sample contain?

A

96

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12
Q

How many pure substances are present in a sample of liquid water (H2O)?

Question 2 options:

0

1

2

3

A

1

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13
Q

Osmium has a density of 22.48 g/mL. What is the mass in grams of a 39.05 mL bar of osmium?

A

877.84

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14
Q

How many significant figures are in the following measurement?

17.0 kg

Question 4 options:

1

2

3

4

A

3

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15
Q

A certain compound was found to contain 23.90 grams of carbon and 2.04 grams of hydrogen. If a sample of this compound contains 71.24 grams of carbon, how many grams of hydrogen does the sample contain?

A

6.08 g

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16
Q

In a chemical reaction 37.1 grams of iron react with oxygen to form 86.8 grams of a compound that contains iron and oxygen atoms.

How many grams of oxygen reacted?

A

49.7 g

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17
Q

A French scientist heated a mixture of tin and air in a sealed flask to produce tin oxide. How does the mass of the flask and it contents after the reaction compare with the mass before the reaction.

Question 7 options:

Mass if larger after reaction

Mass is smaller after reaction

Mass remains the same after the reaction

A

Mass remains the same after the reaction

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18
Q

Complete the following conversion between SI Units.

612 g = ??? mg

Question 8 options:

61200

0.612

612000

6.12

A

612000

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19
Q

All life on earth has evolved from a common, primitive organism through the process of natural selection. This statement is most similar to a scientific .

Question 9 options:

Theory

Law

Hypothesis

A

Theory

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20
Q

A car has an average gas mileage of 45.0 miles per gallon. If the car used 14.1 gallons of gas, how many miles did it drive?

A

635

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21
Q

How many pure substances are present in a sample that contains argon gas (Ar), oxygen gas (O2), and nitrogen gas (N2)?

Question 1 options:

0

1

3

5

A

3

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22
Q

When elemental iron corrodes it combines with oxygen to form iron (III) oxide (rust). A shiny nail initially has a mass of 23.2 g. After the nail rusts what happens to its mass? Assume that all of the rust remains on the nail.

Question 2 options:

Increases

Decreases

Remains the Same

A

Increases

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23
Q

In a chemical reaction 61.0 grams of iron react with oxygen to form 85.2 grams of a compound that contains iron and oxygen atoms.

How many grams of oxygen reacted?

24
Q

A student makes two pure compounds in the lab. Compound A is found to contain 12 grams of carbon and 4 grams of hydrogen. Compound B is found to contain 6 grams of carbon and 2 grams of hydrogen. According to Dalton’s Law of Definite Proportions could these two compounds be the same molecule?

Yes

No

Not Enough Information is Given to Answer the Question

25
How many significant figures are contained in the following measurement? 2 x 108 grams 1 2 3 4
1
26
Osmium has a density of 22.48 g/mL. What is the volume in mL of a 38.00 gram bar of osmium?
1.690
27
Falling barometric pressure precedes the onset of bad weather. This statement is most similar to a scientific . Hypothesis Law Theory
Law
28
An animal ran at a speed of 7.7 meters per second. What was the animal's speed in miles per hour? 1 mile = 1609.3 meters
17
29
Complete the following conversion between SI Units. 8.160 m = ??? cm 0.08160 816.0 8160 0.008160
816.0
30
A certain compound was found to contain 24.18 grams of carbon and 1.82 grams of hydrogen. If a sample of this compound contains 89.20 grams of carbon, how many grams of hydrogen does the sample contain?
6.71 g
31
At a higher temperature, solids (such as salt or sugar) will dissolve better in water. This statement is most similar to a scientific . Theory Hypothesis Law
Hypothesis
32
A certain compound was found to contain 24.00 grams of carbon and 1.88 grams of hydrogen. If a sample of this compound contains 23.27 grams of hydrogen, how many grams of carbon does the sample contain?
307 g
33
In a chemical reaction 66.8 grams of iron react with oxygen to form 86.7 grams of a compound that contains iron and oxygen atoms. How many grams of oxygen reacted?
19.9 grams
34
A material has a mass of 29.65 grams and a volume of 5.0 mL, what is the density of the material?
5.9
35
A student makes two pure compounds in the lab. Compound A is found to contain 12 grams of carbon and 4 grams of hydrogen. Compound B is found to contain 12 grams of carbon and 2 grams of hydrogen. According to Dalton's Law of Definite Proportions could these two compounds be the same molecule? Yes No Not Enough Information is Given to Answer the Question
no
36
How many significant figures are contained in the following measurement? 3486002 kilograms 5 6 7 8
7
37
Exactly one pound of bread dough is placed in a baking tin. The dough is cooked in an oven at 350 °F releasing a wonderful aroma of freshly baked bread during the cooking process. How does the mass of the bread after cooking compare with the initial mass? Increases Decreases Remains the Same
Decreases
38
A car has an average gas mileage of 27.0 miles per gallon. If the car drove 397.1 miles, how many gallons of gas did it use?
14.7
39
Complete the following conversion between SI Units. 3779 μg= ??? g 0.003779 3779000 3.779 3779000000
0.003779
40
Indicate what kind of bonds Ba3N2 has. Ionic bonds only Covalent bonds only Both ionic and covalent bonds
Ionic bonds only
41
Select the correct formula for dinitrogen oxide. N2O 2NO NO2 N3O
N2O
42
Select the correct name for SO2. sulfur dioxide sulfur oxide monosulfur dioxide sulfur (IV) oxide
sulfur dioxide
43
Select the correct formula for disulfur hexafluoride. S2F6 S2F4 SF4 2S6F
S2F6
44
Select all of the molecular compounds. CsCl CaCl2 CrCl3 SiCl4 PCl3 CuCl2
CsCl SiCl4 PCl3
45
Which experiment shows that most of an atom is made up of empty space? Millikan's Oil Drop Experiment Thomson's Cathode Ray Tube Dalton's Law of Multiple Proportions Rutherford Gold Foil
Rutherford Gold Foil
46
Identify each of these elements as a metal or nonmetal. Incorrect Response ____ (2) H ____ Fe. Metal 1 ____ Mg. non metal 2 ____ Br
2 1 1 2
47
The name of Sr(NO3)2 needs to be written with a roman numeral to indicate the metal charge. True False
false
48
An atomic ion is given by the symbol 35Cl1-. This species has ______ protons, ______ neutrons, and ______ electrons.
17 18 18
49
Potassium (K) and oxygen (O) combine to form an ionic compound. What is the symbol for that compound? KO K2O KO2 OK
K2O
50
A student makes two pure compounds in the lab. Compound A is found to contain 12 grams of carbon and 4 grams of hydrogen. Compound B is found to contain 6 grams of carbon and 2 grams of hydrogen. According to Dalton's Law of Definite Proportions could these two compounds be the same molecule? Yes No Not Enough Information is Given to Answer the Question
Yes
51
An atom has an atomic number of 26, a mass number of 58. Which of the following symbols represents this atom? 58^Fe 84^Ce 58^Ce 26^Fe
58^Fe
52
The name of FeS needs to be written with a roman numeral to indicate the metal charge. True False
True
53
Identify each of these elements as a metal or nonmetal. ____ Mg ____ Pt. 1 metal ____ O. 2 nonmetal ____ H
1 1 2 2
54
Select the correct name for FeO. iron (II) oxide iron (I) oxide iron oxide iron monoxide
iron (II) oxide
55
Select the correct formula for ammonium phosphate. NH4(PO4)3 NH4PO4 (NH4)3PO4 NH4(PO4)2
(NH4)3PO4
56
Select the correct formula for strontium nitride. Sr3N2 Sr2N3 SrN SrN2 Sr2N
Sr3N2
57
Indicate what kind of bonds Sr>3N2> has. Ionic bonds only Covalent bonds only Both ionic and covalent bonds
Ionic bonds only

Chem (4 decks)

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