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Chemistry > Semester Exam 1 > Flashcards

Semester Exam 1 Flashcards

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1
Q

Scientists classify matter on the basis of its physical and _____________ properties

A

Chemical

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2
Q

Copper is used more often than aluminum for electric wires. More than anything else, this suggests that copper is ________________________ than aluminum

A

More conductive

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3
Q

The amount of matter packed into a given volume determines its

A

Ductility

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4
Q

Oxygen (O2) is a ________________________

A

Diatomic element

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5
Q

Hydrogen peroxide (H2O2) is a ______________

A

Compound

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6
Q

How many atoms of oxygen are present in Al2(SO4)3

A

12

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7
Q

Dry ice has a temperature of 196 K. What is the temperature of dry ice on a Celsius scale?

A

-77*C

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8
Q

A substance can experience a change of state as ____________ energy is added to or removed from it

A

Thermal

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9
Q

When water vapor forms dew on the grass, _________________ has occurred

A

Condensation

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10
Q

Physical or Chemical Property. A shovel rusts in humid air.

A

Chemical

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11
Q

Physical or Chemical Property. Water evaporates at 100*C.

A

Physical

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12
Q

Physical or Chemical property. Sulfur mixed with an acid produces a gas.

A

Chemical

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13
Q

Physical or Chemical Property. Lead melts in a hot flame.

A

Physical

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14
Q

Convert -145.6*C to Kelvins.

A

127.55*K

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15
Q

The temperature outside is 87*F. What is that temperature in degrees Celsius?

A

30.56*C

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16
Q

What does 35.600 equal in kilograms?

A

35.6

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17
Q

You measure the products of a chemical reaction three times and obtain 8.15 g, 8.16g, and 8.13 g. The actual mass is 8.14 g. Your measurements are _______________________________.

A

Both accurate and precise

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18
Q

The smaller the percent error of a measurement, the more _____________ the measurement.

A

Accurate

19
Q

Using scientific notation, convert 463 kg to milligrams.

A

4.63 X 10^8 mg

20
Q

The measurement 0.00500610 m has how many significant figures?

A

6

21
Q

How many significant figures are in the measurement 0.017000 g

A

5

22
Q

One gallon (3785 mL) of gasoline has a mass of 2540 g. What is the density of gasoline?

A

0.671 g/mL

23
Q

Perform the following operation: (26.9 cm)(5.0 m)

A

1.3 m^2

24
Q

Perform the following operation: 16.1 mL - 6.81 mL - 0.00032 mL.

A

9.3 mL

25
Q

What volume does 1-carat (0.2 g) diamond occupy? (density = 3.27 g/mL)

A

0.06 mL

26
Q

The measurement 1.000010 has how many significant figures?

A

7

27
Q

A(n) _________ system of measurment is any system of measurement based on a decimal scale.

A

Metric

28
Q

The scale of a measuring instrument is ________________, that is, accurately subdivided into measurement units.

A

Graduated

29
Q

Significant digits apply only to ______________ data, not to counted or pure numbers.

A

Measured

30
Q

A measurement is made of two essential parts. What are two parts?

A

Unit and number

31
Q

You measure the mass of a product in a chemical reaction to be 1.87 g. Theoretical calculations predict that you should have obtained 1.95 g. What is the percent error?

A

4.1%

32
Q

Which has the greatest number of significant figures: 35,620 cars, 2.35 m, 25,000 mL?

A

2.35m

33
Q

Perform the following operation, observing significant digits: 7.491 m + 60.2 m + 1.00224 m.

A

68.7 m^3

34
Q

How many significant digits are in the quantity of 17 nickels?

A

0

35
Q

You measure the mass of a product in a chemical reaction to be 1.87 g. Theoretical calculations predict that you should have obtained 1.95 g. What is the percent error?

A

4.1%

36
Q

How many electrons can a d sublevel hold?

A

10

37
Q

The type of sublevel found in all principle energy levels is the ____ sublevel.

A

S

38
Q

Which is the correct electron configuration of aluminum (atomic number 13)?

A

1S^2 2S^2 2P^6 3S^2 3P^1

39
Q

How many neutrons does the isotope 125 over 52 Te have?

A

73

40
Q

Naturally occurring silver consists of two isotopes: 51.82% 107 over 47 Ag (106.9051 u) and 48.18% 109 over 47 Ag (108.9047 u). What is the atomic mass of silver?

A

107.9 u

41
Q

The maximum number of electrons that can be found in any atom’s secound principle level is

A

8

42
Q

Two different isotopes of a single element would have the same number of ________________ but a different number of _______________.

A

Protons/Neutrons

43
Q

The number of protons in an atoms nucleus is its _________________________

A

Atomic number

Chemistry (4 decks)

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