Chemistry 1A - Term 1 Final Review

Question 1

Opinion - I know how to do the various mole calculations.

Accepted Answer

No, I haven't looked at the mole since the last test., Sorta, Yes

Question 2

Pressure of 0.370 atm at 50.0 degrees Celsius. What is the pressure at 22 degrees Celsius?

Accepted Answer

0.34 atm

Question 3

The mass of the object is known to be 2.20 g. The data reflect

Accepted Answer

low accuracy and high precision.

Question 4

How should 0.0000497 be expressed in scientific notation?

Accepted Answer

4.97 x 10^-5

Question 5

Atoms of the elements N and P have:

Accepted Answer

The same number of outer electrons

Question 6

Convert the following number from scientific notation to expanded form: 1.92 x 10^3.

Accepted Answer

1,920.

Question 7

Identify the drawing above as an element, compound, or a mixture.

Accepted Answer

Compound

Question 8

Which physical state of matter has the most kinetic energy?

Accepted Answer

Gas

Question 9

The atomic radius refers to the distance from the nucleus to

Accepted Answer

outer electrons

Question 10

The spin of one electron in an orbital is clockwise, what is the spin of the other electron?

Accepted Answer

counterclockwise

Question 11

What is the process sued to separate crude oil into useful groups of compounds?

Accepted Answer

Fractional Distillation

Question 12

At which point could the substance shown exist as a liquid or a solid, but not a gas?

Accepted Answer

4

Question 13

The mole number is also called

Accepted Answer

Avogadro's Number

Question 14

What is the next atomic orbital in the series 1s, 2s, 2p, 3s, 3p, 4s, _____?

Accepted Answer

3d

Question 15

What is the sum of 334.540 g and 198.9916 g rounded to the correct significant figures?

Accepted Answer

533.532 g

Question 16

Identify the drawing above as an element, compound, or a mixture.

Accepted Answer

Mixture

Question 17

Opinion - I feel ready for the chem final?

Accepted Answer

Yeah, Heck Yeah, Heck No, No

Question 18

Which of these statements about alternative fuels is NOT true?

Accepted Answer

None can be used with current car engines

Question 19

What is a fuel?

Accepted Answer

Substance that provides useful energy

Question 20

What is the noble-gas electron configuration for tin (Sn)?

Accepted Answer

[Kr] 5s^2 4d^10 5p^2

Question 21

What substance needs to be plentiful for complete combustion to occur?

Accepted Answer

Oxygen

Question 22

560.0 mL at 285 K. To what temperature must the gas be lowered if it is to occupy 250.0 mL?

Accepted Answer

127 K

Question 23

A halogen is an example of a(n)

Accepted Answer

nonmetal

Question 24

In which of the following is the number of electrons the ion contains given correctly?

Accepted Answer

K(+) has 18 electrons

Question 25

The combined gas law sets up a relationship between which of the following?

Accepted Answer

Pressure, volume, and temperature

Question 26

Which of the following is true of a proton?

Accepted Answer

positively charged; located in the nucleus

Question 27

Which of these is not an alternative fuel?

Accepted Answer

Crude Oil

Question 28

What is crude oil?

Accepted Answer

A mixture of hydrocarbons

Question 29

How many significant digits are in the number 0.00120?

Accepted Answer

3

Question 30

If my pressure is 2 atm, I must use the "R" constant that equals 8.31 L kPa/mol K

Accepted Answer

False

Question 31

An element has an atomic number of 30. How many protons and electrons are in an atom?

Accepted Answer

30 protons, 30 electrons

Question 32

Periods on the periodic table are arranged

Accepted Answer

in horizontal rows

Question 33

240 mL at 800.0 mm Hg and increases to 1200.0 mm Hg, what will be the new volume?

Accepted Answer

160 mL

Question 34

I have 27 liters of a gas at 175 kPa and a temperature of 225 K, find the moles. R = 8.314

Accepted Answer

2.5 mol

Question 35

The sample was 90 degrees Celsius. Which student's measurements were both accurate and precise?

Accepted Answer

Student 4

Question 36

At which point could the substance shown exist as a gas or a solid, but not a liquid?

Accepted Answer

3

Question 37

How many moles of water are present in 54.048 g?

Accepted Answer

3

Question 38

Convert 96,543 milligrams to grams.

Accepted Answer

96.543 g

Question 39

Is separating sand from gravel a physical or chemical change?

Accepted Answer

Physical

Question 40

A sample has a volume of 10.0 mL. The density is 1.55 g/mL. Find the mass of the sample?

Accepted Answer

15.5 g

Question 41

Groups on the periodic table are arranged

Accepted Answer

in vertical columns

Question 42

What are the units for "n"

Accepted Answer

moles

Question 43

Electronegativity

Accepted Answer

increases to the top right corner

Question 44

Are fireworks exploding a physical or chemical change?

Accepted Answer

Chemical

Question 45

How many atoms are in a 1.22 mole sample of sodium?

Accepted Answer

7.34 x 10^23

Question 46

Mendeleev's Periodic Law states that chem. & physical props repeat themselves in groups of

Accepted Answer

8

Question 47

Which electron configuration is written incorrectly?

Accepted Answer

1s^2 2s^4 2p^6 3s^2 3p^3

Question 48

Charles's Law relates

Accepted Answer

temperature and volume only.

Question 49

Between points 2 and 3, energy is being used to

Accepted Answer

melt ice.

Question 50

Express the product of 3.3 cm and 7.00 cm using the correct number of significant figures.

Accepted Answer

23 square centimeters

Question 51

Convert 44 centimeters to meters.

Accepted Answer

0.44 m

Question 52

Solids, liquids, and gases are three common states of matter. Which of these can flow?

Accepted Answer

gases and liquids only

Question 53

The "opposite" of ionization energy is

Accepted Answer

electronegativity

Question 54

According to the kinetic molecular theory, which of these statements is NOT true?

Accepted Answer

Only particles in the gaseous state are in constant motion.

Question 55

Dalton's atomic theory includes which idea?

Accepted Answer

Atoms of the same element are always identical

Question 56

How many significant figures are there in the measurement 64,000 mg?

Accepted Answer

2

Question 57

The mass number of an element is equal to

Accepted Answer

the sum of the protons and neutrons

Question 58

Between points 3 and 4, energy is being used to

Accepted Answer

heat water

Question 59

Most elements that form anions are

Accepted Answer

Nonmetals

Question 60

What is the molar mass of Na2S?

Accepted Answer

78.05 g

Question 61

What are the different ways a substance can be measured?

Accepted Answer

All of these

Question 62

Boyle's Law relates

Accepted Answer

pressure and volume only.

Question 63

21.0 L - 7.80 atm - 900.0 K becomes 4.50 atm - 750.0 K - What is the new volume?

Accepted Answer

30.3 L

Question 64

The amount of energy it takes to remove an electron from an atom is

Accepted Answer

ionization energy

Chemistry 1A - Term 1 Final Review

Questions 68

Chemistry 1A - Term 1 Final Review

Questions 68