Week 3 Lesson Quiz

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Question #1

A potassium dichromate solution is saturated at a concentration of 1 M.

A TRUE

B FALSE

Question #2

What is the molarity of the drink mix if you have 1.00 mol of compound and 0.20 L of solution

A 1.00 M

B 0.67 M

C 5.00 M

D 2.53 M

Question #3

What is the molarity of the drink mix if you have 0.53 mol of compound and 0.79 L of solution?

A 0.67 M

B 5.00 M

C 2.53 M

D 1.00 M

Question #4

A potassium chromate solution is saturated at a concentration of 1 M.

A TRUE

B FALSE

Question #5

A nickel (II) chloride solution is saturated at a concentration of 1 M.

A TRUE

B FALSE

Question #6

A hypothesis should suggest a relationship between what two variables the researcher will test

A dependent and independent

B dependent and inductive

C independent and deductive

D deductive and inductive

Question #7

Which hypothesis states that no statistical significance exists between the independent and dependent variable?

A alternative hypothesis

B complex hypothesis

C null hypothesis

D simple hypothesis

E statistical hypothesis

Question #8

What is a good generic definition of a hypothesis?

A A combination of politics and scientific research to answer important questions for the general population

B A prediction concerning a natural phenomenon based on personal observations in the natural world.

C An educated guess or expected answer to a scientific question based on prior knowledge and observation.

D A theory that can easily be proven by conducting a few simple experiments.

Question #9

You are preparing solutions in the lab and need to make 250.0 mL of a 2.00 M HCl solution. All you have in stock is 6.00 M HCl. How many milliliters of the stock solution do you need?

A 750.0 mL

B 520.0 mL

C 0.048 mL

D 83.3 mL

Question #10

Suppose you have a NaF solution that has a concentration of 45.5 % by mass. If you take 34.2 g of this solution, how many moles does that represent?

A 0.814

B 15.6

C 75.2

D 0.371

Question #11

If you have a giant stockpile of 5.00 M KOH, and you pour out some of it into a 750 mL container, how many moles did you pour out?

A 3.75 mol

B 3.75 x 103 mol

C 56.1 mol

D 6.67 mol

Question #12

If I start with 0.0350 L of a 12.0 M hydrochloric acid solution, and dilute it with water to a new volume of 1.20 L, what is the new concentration?

A 0.504 M

B 3.50 M

C 0.420 M

D 0.350 M

Question #13

What mass of sucrose, C12H22O11 is present in 75.0 mL of a 2.50 M solution?

A 64.2 grams

B 188 grams

C 642 grams

D 0.188 grams

Question #14

‘Suppose you have a 0.10 M solution of AlBr3. What is the concentration of each ion?

A 0.033 M Al3+ ions and 0.033 M Br- ions

B 10 M Al3+ ions and 0.30 M Br- ions

C 0.30 M Al3+ ions and 0.10 M Br- ions

D 0.10 M Al3+ ions and 0.033 M Br- ions

Question #15

You are preparing some solutions for your instructor and have been asked to prepare 3.00 L of a 0.250M sodium hydroxide solution. To make the solution, you should weigh out:

A 75.0 g NaOH and add water until the final solution has a volume of 3.00 L.

B 30.0 g NaOH and add 3.00 L of water to it.

C 30.0 g NaOH and add water until the final solution has a volume of 3.00 L.

D 75 g NaOH and add 3.00 L water to it.

Question #16

‘If given 0.0543 kg of calcium nitrate to dissolve with water to 0.355 L, what would be the concentration?

A 0.117 M

B 1.99 M

C 0.331 M

D 0.932 M

Question #17

If you were to count all the atoms in the formula C6H9N3O5S, how many would there be?

A none of these

B 23

C 810

D 6

E 24

Question #18

The correct name for Ca2+ is

A calcium

B calcium ion

C monocalcium ion

D calcium(I) ion

E calcium(II) ion

Question #19

The correct name for LiCl is

A lithium monochloride

B lithium(I) chloride

C monolithium chloride

D lithium chloride

E monolithium monochloride

Question #20

Which of the following is the proper name for HCO3- ?

A hydrogen carbonate

B hydrocarbate

C hydrocarbooxide

D hydrogen carbon trioxide

E none of the above

Question #21

If you combined magnesium and oxygen into a compound, how would the formula be written?

A Mg2O2.

B Mg2O.

C MgO2.

D MgO

E none of the above

Question #22

What would be the proper name of a compound made from cesium and oxygen?

A cesium oxide

B cesium (I) oxide

C oxygen ceside

D cesium dioxide

E none of the above

Question #23

If given the formula N2O8, how would you properly name it?

A dinitrogen oxide

B nitrogen octoxide

C dinitrogen octoxide

D nitrogen tetroxide

E none of the above

Question #24

Which of the compounds, C3H8, MgCl2, Zn(NO3)2, OCl2, are expected to exist as molecules?

A MgCl2 and Zn(NO3)2

B C3H8, Zn(NO3)2, and OCl2

C C3H8 and OCl2

D only C3H8

Question #25

How many oxygen atoms are in the formula Al(NO3)3?

A 6

B 12

C 1

D 9

E 3

Question #26

`If I tell you the formula mass for a compound is 153.82 amu, which of the following could it be?

A nitrogen dioxide

B diphosphorus pentafluoride

C carbon tetrachloride

D diboron tetrachloride

E none of the above

Question #27

In the formula Fe2(SO4)3, how many sulfur atoms are there?

A 1

B 12

C 3

D 4

E 2

Question #28

The chemical formula for nitrous acid is

A HNO3

B HNO2

C H3N

D H2N2O6

Question #29

Which element can form more than one kind of monatomic cation?

A Cl

B Cr

C Cs

D Ca

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