Quizzes

Question 1

You measure the temperate of solution in the lab and find it is 104.5 Celsius. What is this temperature in Kelvin? Please report your answer to four significant figures, and include units in your answer as “K”. For example, a possible answer would be 25.67 K

Do not write this answer using scientific notation.

Answer 1

377.7 K

Question 2

You measure the temperate of solution in the lab and find it is 22.6 Celsius. What is this temperature in Fahrenheit? Please report your answer to three significant figures, and please include units in your answer as “F”. For example, a possible answer would be 25.67 F

Do not write this answer using scientific notation.

Answer 2

72.6 F

Question 3

I have weighed our 456.7 milligrams (mg) of solid copper. How many grams is this? Please report your answer to the correct significant figures, and please include units in your answer as “g”. For example, a possible answer would be 25.67 g

Do not write your answer using scientific notation.

Answer 3

0.4567 g

Question 4

A student just found a piece of solid sodium that has a mass of 5.2 g. How many micrograms (ug) is this?

Answer 4

5.2x10^6 ug

Question 5

Match the numerical value with the correct number of significant figures

0.000230

Answer 5

three significant figures

Question 6

Match the numerical value with the correct number of significant figures

1.2

Answer 6

two significant figures

Question 7

Match the numerical value with the correct number of significant figures

12000

Answer 7

ambiguous

Question 8

Match the numerical value with the correct number of significant figures

1.560

Answer 8

four significant figures

Question 9

Match the numerical value with the correct number of significant figures

100 cm = 1 m

Answer 9

unlimited

Question 10

Match the numerical value with the correct number of significant figures

1.0000x10^6

Answer 10

five significant figures

Question 11

Solve the problem below, reporting your answer to the correct number of significant figures:

6.2 x 3.115 x 4.22 x 0.655

Answer 11

53

Question 12

Solve the problem below, reporting your answer to the correct number of significant figures:

1239.3 + 12.73 + 3.42 =

Answer 12

1255.5

Question 13

Solve the problem below, reporting your answer to the correct number of significant figures:

5.211 x 3.115 x (3.15 + 0.442)

Answer 13

58.3

Question 14

A nanoparticle is measured and found to have a diameter of 325nm. What is the diameter of this particle in meters (m)?

Answer 14

3.25x10^-7

Question 15

A student got carried away and weighed out 35kg of sodium. How much sodium is that in ug?

Answer 15

3.5x10^10

Question 16

A titanium bicycle frame displaces 0.314 L of water and has a mass of 1.41kg. What is the density of this bicycle in g/cm^3?

Answer 16

4.49

Question 17

Convert 9.255 cm^3 to gallons (1 gallon=3.79L)

Answer 17

2.442 gallons

Question 18

Na+

Answer 18

eleven protons, ten electrons

Question 19

Na

Answer 19

eleven protons, eleven neutrons

Question 20

N-15

Answer 20

contains one additional neutrons as compared to number of protons

Question 21

Iodine

Answer 21

Nonmetal that likes to gain an electron

Question 22

Oxygen

Answer 22

nonmetal that likes to gain two electrons

Question 23

Ne-20

Answer 23

contains an equal number of protons and neutrons

Question 24

Magnesium has three naturally occurring isotopes with the masses and abundance listed below. What is the atomic mass of magnesium? Please report your answer using four significant figures. Do not include units, and do not write your answer using significant notation. ex. 35.67

Mg-24 Mass=23.9850 amu Abundance=78.99%
Mg-25 Mass=24.9858 amu Abundance=10.00%
Mg-26 Mass=25.9826 amu Abundance=11.01%

Answer 24

24.31

Question 25

A sample was found to contain 8.15x10^27 atoms of nickel. What is the mass of this sample in Kg?

Hint, the atomic mass of nickel is 58.69 amu.

Do not write your answer in scientific notation and do not include units. Your answer should contain 4 significant figures ex. 805.3

Answer 25

794.3

Question 26

How many atoms are present in 39.7 g of sulfur?

Answer 26

7.46x10^23 atoms

Question 27

How many moles are present in a sample that contains 12.89 g of the element Platinum?

Answer 27

6.608x10^-2 moles

Question 28

If the total mass of the reactants of a chemical reaction is 8.75g, then the mass of the products of that chemical reaction must be _________.

Answer 28

8.75g

Question 29

If an atom of a given element that has an overall neutral charge has 8 protons, it must have 8 electrons.

Answer 29

true

Question 30

How many protons do the atoms of the element Thorium (Th) contain?

Answer 30

90

Question 31

Calcium (Ca) atoms are most likely to ___________.

Answer 31

lose 2 electrons

Question 32

Chlorine (Cl) atoms are most likely to ___________.

Answer 32

form anions