Chemistry - Chapter 5

When elements combine to form compounds,

their properties change completely

The first chemist to formally state the law of constant composition was ________.

Proust

The law of constant composition states:

All samples of a given compound have the same proportions of their constituent elements.

The oxygen-to-hydrogen mass ratio of water is always 8.0 is an example of what fundamental law?

Law of Constant Composition

What is the oxygen-to-hydrogen mass ratio for H2O2?

16

The phosphorous-to-hydrogen mass ratio is 10.2 for a compound. This ratio could correspond to the compound

PH3

What is the oxygen-to-sulfur mass ratio of sulfur dioxide?

1.0

Which of the following statements about chemical formulas is FALSE?

The subscripts represent the relative mass of each type of atom in the compound.

How many total atoms are in the formula Al2(CO3)3?

14

How many carbon atoms are in the formula Al2(CO3)3?

3

How many oxygen atoms are in the formula Al2(CO3)3?

9

Which formula shows the proper use of parentheses?

Ca(NO3)2

How many of each type of atoms are there in the formula NH4C2H3O2?

N = 1, H = 7, C = 2, O = 2

How many of each type of atom are there in the formula Ca3(PO4)2?

Ca = 3, P = 2, O = 8

How many of each type of atom are there in the formula (NH4)2HPO4?

N = 2, H = 9, P = 1, O = 4

What is the correct formula for a compound that has three oxygen atoms and one sulfur atom?

SO3

What is the correct formula of a compound that has ten oxygen atoms and four phosphorus atoms?

P4O10

Carbon is considered which of the following?

atomic element

Which among the following elements does NOT exist as a diatomic molecule in nature?

neon

Carbon monoxide is considered which of the following?

molecular compound

Fluorine is considered which of the following?

molecular element

Ammonium fluoride is considered which of the following?

ionic compound

Which of the following species is a molecular element?

chlorine

Which of the following is a molecular compound?

nitrogen monoxide

What is the formula for an ionic compound made of barium and nitrogen?

Ba3N2

What is the formula for an ionic compound made of magnesium and sulfur?

MgS

What is the formula for an ionic compound made of carbon and oxygen?

Carbon and oxygen do not form an ionic compound

The ionic compound that forms between potassium and oxygen is

K2O

What is the formula for an ionic compound made of aluminum and oxygen?

Al2O3

What is the name of the ionic compound made of beryllium and chlorine?

beryllium chloride

What is the name of the compound made from lithium and oxygen?

lithium oxide

Which metal atom below would NOT be involved in formation of a Type II compound?

Ba

What is the name of CoS?

cobalt(II) sulfide

What is the name of Ca(NO3)2?

calcium nitrate

Which formula shown is incorrect for the name given?

magnesium nitrite: Mg(NO2)3

Which formula shown is incorrect for the name given?

lithium sulfate: LiSO4

What is the name of the compound whose formula is Na2O?

sodium oxide

What is the formula for the acetate polyatomic ion?

C2H3O2-

What is the correct formula for potassium dichromate?

K2Cr2O7

What is the correct formula for ammonium hydrogen sulfate?

NH4HSO4

The formula for potassium chlorate is KClO3. The formula for magnesium chloride is MgCl2. What is the formula for magnesium chlorate?

Mg(ClO3)2

The charge of a vanadium ion in the compound V2O5 is:

5+

What is the correct formula for the hypochlorite polyatomic ion?

ClO-

What is the correct name for the BrO4 1- ion?

perbromate

Choose the pair of names and formulas that do NOT match.

all of these are correct

The name trisodium phosphate is incorrect for the compound Na3PO4 because

you cannot use a prefix for the first element of an ionic compound

What is the name of the molecular compound SF5?

sulfur pentafluoride

What is the name of the molecular compound SO3?

sulfur tetraoxide

What is correct name of the compound whose formula is N2O4?

dinitrogen tetroxide

What is correct name of the compound whose formula is BF3?

boron trifluoride

What would the formula of diiodine pentasulfide be?

I2S5

What is the correct formula for the molecular compound heptaphosphorus octafluoride?

P7F8

What is the proper name for HBr (aq)?

hydrobromic acid

What is the name of HI (aq)?

hydroiodic acid

What is the name of HIO3?

iodic acid

What is the name of HNO2?

Nitrous acid

A certain oxyacid is derived from the oxyanion SO32-. The formula for the oxyacid is

H2SO3.

What is the formula mass of sulfurous acid?

82.08 amu

What is the formula mass for potassium nitrate?

101.10 amu

What is the formula mass for diboron tetrachloride?

163.43 amu

What is the formula mass of copper(II) fluoride?

101.55

Which of the following has the largest formula mass?

SO2

Which of the following compounds have the smallest formula mass?

H2O

A compound has a formula mass of 61.98 amu and is comprised of atoms of sodium and oxygen in a definite ratio. The name of the compound described here is

sodium oxide

Chemistry - Chapter 5 - Subjecto.com

Chemistry – Chapter 5

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When elements combine to form compounds,

their properties change completely

The first chemist to formally state the law of constant composition was ________.

Proust

The law of constant composition states:

All samples of a given compound have the same proportions of their constituent elements.

The oxygen-to-hydrogen mass ratio of water is always 8.0 is an example of what fundamental law?

Law of Constant Composition

What is the oxygen-to-hydrogen mass ratio for H2O2?

16

The phosphorous-to-hydrogen mass ratio is 10.2 for a compound. This ratio could correspond to the compound

PH3

What is the oxygen-to-sulfur mass ratio of sulfur dioxide?

1.0

Which of the following statements about chemical formulas is FALSE?

The subscripts represent the relative mass of each type of atom in the compound.

How many total atoms are in the formula Al2(CO3)3?

14

How many carbon atoms are in the formula Al2(CO3)3?

3

How many oxygen atoms are in the formula Al2(CO3)3?

9

Which formula shows the proper use of parentheses?

Ca(NO3)2

How many of each type of atoms are there in the formula NH4C2H3O2?

N = 1, H = 7, C = 2, O = 2

How many of each type of atom are there in the formula Ca3(PO4)2?

Ca = 3, P = 2, O = 8

How many of each type of atom are there in the formula (NH4)2HPO4?

N = 2, H = 9, P = 1, O = 4

What is the correct formula for a compound that has three oxygen atoms and one sulfur atom?

SO3

What is the correct formula of a compound that has ten oxygen atoms and four phosphorus atoms?

P4O10

Carbon is considered which of the following?

atomic element

Which among the following elements does NOT exist as a diatomic molecule in nature?

neon

Carbon monoxide is considered which of the following?

molecular compound

Fluorine is considered which of the following?

molecular element

Ammonium fluoride is considered which of the following?

ionic compound

Which of the following species is a molecular element?

chlorine

Which of the following is a molecular compound?

nitrogen monoxide

What is the formula for an ionic compound made of barium and nitrogen?

Ba3N2

What is the formula for an ionic compound made of magnesium and sulfur?

MgS

What is the formula for an ionic compound made of carbon and oxygen?

Carbon and oxygen do not form an ionic compound

The ionic compound that forms between potassium and oxygen is

K2O

What is the formula for an ionic compound made of aluminum and oxygen?

Al2O3

What is the name of the ionic compound made of beryllium and chlorine?

beryllium chloride

What is the name of the compound made from lithium and oxygen?

lithium oxide

Which metal atom below would NOT be involved in formation of a Type II compound?

Ba

What is the name of CoS?

cobalt(II) sulfide

What is the name of Ca(NO3)2?

calcium nitrate

Which formula shown is incorrect for the name given?

magnesium nitrite: Mg(NO2)3

Which formula shown is incorrect for the name given?

lithium sulfate: LiSO4

What is the name of the compound whose formula is Na2O?

sodium oxide

What is the formula for the acetate polyatomic ion?

C2H3O2-

What is the correct formula for potassium dichromate?

K2Cr2O7

What is the correct formula for ammonium hydrogen sulfate?

NH4HSO4

The formula for potassium chlorate is KClO3. The formula for magnesium chloride is MgCl2. What is the formula for magnesium chlorate?

Mg(ClO3)2

The charge of a vanadium ion in the compound V2O5 is:

5+

What is the correct formula for the hypochlorite polyatomic ion?

ClO-

What is the correct name for the BrO4 1- ion?

perbromate

Choose the pair of names and formulas that do NOT match.

all of these are correct

The name trisodium phosphate is incorrect for the compound Na3PO4 because

you cannot use a prefix for the first element of an ionic compound

What is the name of the molecular compound SF5?

sulfur pentafluoride

What is the name of the molecular compound SO3?

sulfur tetraoxide

What is correct name of the compound whose formula is N2O4?

dinitrogen tetroxide

What is correct name of the compound whose formula is BF3?

boron trifluoride

What would the formula of diiodine pentasulfide be?

I2S5

What is the correct formula for the molecular compound heptaphosphorus octafluoride?

P7F8

What is the proper name for HBr (aq)?

hydrobromic acid

What is the name of HI (aq)?

hydroiodic acid

What is the name of HIO3?

iodic acid

What is the name of HNO2?

Nitrous acid

A certain oxyacid is derived from the oxyanion SO32-. The formula for the oxyacid is

H2SO3.

What is the formula mass of sulfurous acid?

82.08 amu

What is the formula mass for potassium nitrate?

101.10 amu

What is the formula mass for diboron tetrachloride?

163.43 amu

What is the formula mass of copper(II) fluoride?

101.55

Which of the following has the largest formula mass?

SO2

Which of the following compounds have the smallest formula mass?

H2O

A compound has a formula mass of 61.98 amu and is comprised of atoms of sodium and oxygen in a definite ratio. The name of the compound described here is

sodium oxide

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