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Chem Phys > Packet 2 > Flashcards

Packet 2 Flashcards

(63 cards)

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1
Q

Which temperature is the same as 13 °C?

A

B. 286 K

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2
Q

Convert the melting point of the metal obtained from copper(I) sulfide ore to degrees Celsius.

A

1084 °C

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3
Q

What is the mass of the copper metal on a triple-beam balance with the rider on the 0-10 gram beam at the shown position?

A

D. 5.50 g

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4
Q

What is the correct reading of the meniscus in the buret diagram?

A

B. 41.35 mL

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5
Q

How should the total for the addition example be rewritten if significant figures are observed?

A

D. 5,610.3

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6
Q

Which measurement contains a total of three significant figures?

A

C. 0.0100 g

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7
Q

Which represents an Erlenmeyer flask?

A

D.

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8
Q

Which set of coordinates would graphically present the solubility data of NaNO3 most clearly?

A

B.

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9
Q

Which graph best represents the solubility curve from the student’s results?

A

A.

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10
Q

Substance C formed from elements A and B must be what?

A

B. a compound

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11
Q

At 1 atmosphere and 20 °C, all samples of H2O(l) must have the same:

A

B. density

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12
Q

A substance composed only of atoms having the same atomic number is classified as:

A

B. an element

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13
Q

The formula Al2S3 represents:

A

B. a binary compound

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14
Q

Which cannot be decomposed by chemical change?

A

A. sodium

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15
Q

Which substance can be decomposed by a chemical change?

A

B. CO

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16
Q

What is the percent error for the gram atomic mass of magnesium determined to be 24.7 compared to the accepted value of 24.3?

A

B. 1.65

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17
Q

What is the student’s percent error for the heat of vaporization of water determined to be 620 calories per gram?

A

B. 14.8

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18
Q

Which element in Group VA has the greatest metallic character?

A

D. Bi

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19
Q

The element with the lowest ionization energy would be found in which group?

A

A. IIA

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20
Q

As the elements in Group IA are considered in order of increasing atomic number, the atomic radius increases primarily due to an increase in the number of:

A

D. principal energy levels

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21
Q

Which pair of Group VA elements are nonmetals?

A

B. nitrogen and phosphorus

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22
Q

The element in Period 2 with the largest covalent atomic radius is:

A

C. an alkali metal

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23
Q

The elements in Period 3 all have the same number of:

A

D. principal energy levels containing electrons

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24
Q

Which element in Period 3 has the least tendency to attract electrons?

A

A. Mg

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25
In which shell are the valence electrons of the elements in Period 2 found?
B. 2
26
What is the total number of valence electrons in an atom of phosphorus in the ground state?
A. 5
27
An element whose atoms have the electron configuration 2-8-18-1 is:
C. an alkali metal
28
Which element in the ground state has a complete outermost shell?
A. He
29
What is the total number of electrons in the valence shell of an atom of aluminum in the ground state?
C. 3
30
Which elements are both classified as metalloids?
A. Ge and As
31
The element sulfur is classified as a:
C. nonmetal
32
Which list represents the classification of nitrogen, neon, magnesium, and silicon, respectively?
B. nonmetal, noble gas, metal, metalloid
33
Which of the following metals has the lowest melting point?
B. mercury
34
Which element is considered malleable?
A. gold
35
A characteristic of most nonmetallic solids is that they are:
A. brittle
36
At STP, which substance is the best conductor of electricity?
D. silver
37
Which element is brittle in the solid phase and is a poor conductor of heat and electricity?
B. sulfur
38
A characteristic of a nonmetal is:
B. high electronegativity
39
At STP, which element has a definite shape and volume?
A. Ag
40
At 25 °C, in which phase of matter do most known elements exist?
A. solid
41
The chemical properties of an atom are related to the number of its:
B. valence electrons
42
The chemical properties of the elements are periodic functions of their atomic:
C. numbers
43
Which element has the highest electrical conductivity?
A. Mg
44
Which atom has the strongest attraction for electrons?
A. Cl
45
Which atom has the greatest tendency to gain electrons?
D. F
46
A chloride ion differs from a chlorine atom in that the chloride ion has:
C. a larger radius
47
How does the size of an aluminum atom change when it becomes an ion with a charge of +3?
A. It becomes smaller by losing 3 electrons.
48
Which element has an atom with the electron configuration 2882?
C. Ca
49
Which electron configuration is correct for a sodium ion?
B. 2-8
50
What is the total number of valence electrons in an atom of electron configuration X (2-8-8-2)?
2
51
Which is the correct electron dot representation of an atom of sulfur in the ground state?
C. . .. . S:
52
Which is the correct electron dot symbol for an aluminum atom in the ground state?
B. . Al:
53
The electron dot symbol X: represents:
B. an alkaline earth metal
54
What is the maximum number of electrons that can occupy the second principal energy level?
B. 8
55
Which principal energy level of an atom contains an electron with the lowest energy?
A. n= 1
56
Which sample of O2 contains a total of 3.01×10^23 molecules at STP?
A. 1.00 moles
57
How many molecules are in 0.25 mole of CO?
C. 3.0×10^23
58
The total number of sodium atoms in 46.0 grams of sodium is:
B. 6.02×10^23
59
What is the mass of 3.0×10^23 atoms of neon?
B. 0.50 g
60
Which change represents sublimation?
C. I2(s)→I2(g)
61
A mixture of ice and water is in equilibrium at standard pressure. The temperature of the mixture must be:
A. 0 °C
62
If the Kelvin temperature of a gas sample is doubled while the pressure is halved, the volume of the gas will:
D. increase 4 times
63
The volume of a sample of hydrogen gas at STP is 1.00 liter. As the temperature decreases, pressure remaining constant, the volume of the sample:
A. decreases

Chem Phys (2 decks)

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