Ch3 Quiz

Question 1

What is the term for matter having an indefinite composition and variable properties?

Answer 1

Heterogeneous mixture

Question 2

What is the chemical element corresponding with the symbol C

Answer 2

Carbon

Question 3

If 2.43 g of magnesium reacts with oxygen to produce 4.03 g of magnesium oxide, what is the mass of reacting oxygen gas?

Answer 3

1.60 g

Question 4

What is the term for a chart that arranges elements according to their properties and includes metals, nonmetals, and semimetals?

Answer 4

Periodic Table

Question 5

Evaporating ethyl alcohol is a … change

Answer 5

Physical

Question 6

What is the term for a pure substance that can be broken down into two or more substances by chemical reaction?

Answer 6

Compound

Question 7

What is the term for a direct change of state from gas to solid?

Answer 7

Deposition

Question 8

What is the term for the number that identifies a particular element?

Answer 8

Atomic number

Question 9

Refer to a periodic table and predict which of the following is a liquid nonmetal at 25 °C and one atmosphere pressure

Answer 9

Br (Bromine)

Question 10

Cyanocobalamin, C63H88CoN14O14P, is vitamin B12. What is the number of atoms in one molecule of vitamin B12?

Answer 10

181