Week 3 Lesson Quiz

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Question #1

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

A FALSE

B TRUE

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 5.00 M

B 2.53 M

C 0.67 M

D 1.00 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 5.00 M

B 1.00 M

C 0.67 M

D 2.53 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 FALSE

B TRUE

Question #6

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

A independent and deductive

B dependent and independent

C dependent and inductive

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 simple hypothesis

D statistical hypothesis

E null hypothesis

Question #8

What is a good generic definition of a hypothesis?

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

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

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

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

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 0.048 mL

B 83.3 mL

C 750.0 mL

D 520.0 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 0.371

B 75.2

C 0.814

D 15.6

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 6.67 mol

B 3.75 x 103 mol

C 56.1 mol

D 3.75 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 0.420 M

B 3.50 M

C 0.350 M

D 0.504 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 642 grams

C 0.188 grams

D 188 grams

Question #14

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

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

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

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

D 0.30 M Al3+ ions and 0.10 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 30.0 g NaOH and add 3.00 L of water to it.

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

C 75.0 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 0.932 M

D 0.331 M

Question #17

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

A 810

B 24

C 23

D 6

E none of these

Question #18

The correct name for Ca2+ is

A calcium ion

B calcium(II) ion

C calcium

D calcium(I) ion

E monocalcium ion

Question #19

The correct name for LiCl is

A monolithium monochloride

B lithium chloride

C lithium monochloride

D monolithium chloride

E lithium(I) chloride

Question #20

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

A hydrocarbate

B hydrogen carbon trioxide

C hydrocarbooxide

D hydrogen carbonate

E none of the above

Question #21

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

A MgO

B Mg2O.

C MgO2.

D Mg2O2.

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 oxygen ceside

C cesium dioxide

D cesium (I) oxide

E none of the above

Question #23

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

A nitrogen tetroxide

B dinitrogen octoxide

C dinitrogen oxide

D nitrogen octoxide

E none of the above

Question #24

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

A C3H8, Zn(NO3)2, and OCl2

B only C3H8

C C3H8 and OCl2

D MgCl2 and Zn(NO3)2

Question #25

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

A 12

B 3

C 6

D 9

E 1

Question #26

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

A diboron tetrachloride

B carbon tetrachloride

C nitrogen dioxide

D diphosphorus pentafluoride

E none of the above

Question #27

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

A 4

B 2

C 12

D 1

E 3

Question #28

The chemical formula for nitrous acid is

A HNO3

B H3N

C HNO2

D H2N2O6

Question #29

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

A Ca

B Cr

C Cs

D Cl

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