Question 1

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

Accepted Answer

A) O10P4 
B) 10OP4 
C) 4PO10 
D) P4O10 
E) none of the above 
A) O10P4 
B) 10OP4 
C) 4PO10 
D) P4O10 
E) none of the above

Question 2

Which of the following statements about chemical formulas is FALSE?

Accepted Answer

A) The subscripts represent the relative number of each type of atom in the compound. 
B) The subscripts represent the relative mass of each type of atom in the compound. 
C) The subscripts do not change for a given compound. 
D) Different compounds made of the same elements have different subscripts. 
E) All of the statements are true. 
A) The subscripts represent the relative number of each type of atom in the compound. 
B) The subscripts represent the relative mass of each type of atom in the compound. 
C) The subscripts do not change for a given compound. 
D) Different compounds made of the same elements have different subscripts. 
E) All of the statements are true.

Question 3

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

Accepted Answer

A) sodium monoxide 
B) disodium oxide 
C) disodium monoxide 
D) sodium oxide 
E) none of the above 
A) sodium monoxide 
B) disodium oxide 
C) disodium monoxide 
D) sodium oxide 
E) none of the above

Question 4

Chemical formulas normally list the most metallic elements first.

Accepted Answer

A) True 
 B)False

Question 5

What is the name of CoS?

Accepted Answer

A) cobalt(II)sulfide 
B) cobalt sulfide 
C) cobalt monosulfide 
D) cobaltous sulfur 
E) none of the above 
A) cobalt(II)sulfide 
B) cobalt sulfide 
C) cobalt monosulfide 
D) cobaltous sulfur 
E) none of the above

Question 6

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

Accepted Answer

A) hypobromite 
B) perbromate 
C) bromite 
D) bromate 
E) none of the above 
A) hypobromite 
B) perbromate 
C) bromite 
D) bromate 
E) none of the above

Question 7

What is the mass ratio of Na to S in sodium sulfide?

Accepted Answer

A) 7.17 
B) 55.06 
C) 0.717 
D) 1.43 
E) none of the above 
A) 7.17 
B) 55.06 
C) 0.717 
D) 1.43 
E) none of the above

Question 8

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

Accepted Answer

A) 0.125 
B) 4 
C) 8 
D) 16 
E) none of the above 
A) 0.125 
B) 4 
C) 8 
D) 16 
E) none of the above

Question 9

If the mass ratio of K to F in a compound is 2.06:1,how many grams of F are needed to react with   of K?

Accepted Answer

A) 0.877 
B) 1.12 
C) 0.112 
D) 8.77 
E) none of the above 
A) 0.877 
B) 1.12 
C) 0.112 
D) 8.77 
E) none of the above

Question 10

The law of constant composition states:

Accepted Answer

A) Matter cannot be either created or destroyed in a chemical reaction. 
B) The nucleus is a dense region of positive charge that always contains protons and neutrons. 
C) All samples of a given compound have the same proportions of their constituent elements. 
D) All atoms of a given element have a constant composition and are different than atoms of any other element. 
E) none of the above 
A) Matter cannot be either created or destroyed in a chemical reaction. 
B) The nucleus is a dense region of positive charge that always contains protons and neutrons. 
C) All samples of a given compound have the same proportions of their constituent elements. 
D) All atoms of a given element have a constant composition and are different than atoms of any other element. 
E) none of the above

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

Which of the following statements about chemical formulas is FALSE?

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

Chemical formulas normally list the most metallic elements first.

What is the name of CoS?

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

What is the mass ratio of Na to S in sodium sulfide?

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

If the mass ratio of K to F in a compound is 2.06:1,how many grams of F are needed to react with of K?

The law of constant composition states:

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

Exam 5: Molecules and Compounds

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

Which of the following statements about chemical formulas is FALSE?

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

Chemical formulas normally list the most metallic elements first.

What is the name of CoS?

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

What is the mass ratio of Na to S in sodium sulfide?

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

If the mass ratio of K to F in a compound is 2.06:1,how many grams of F are needed to react with of K?

The law of constant composition states:

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

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

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

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