Chem-1 exam

Question 1

What is matter?

Answer 1

anything that occupies space and has mass.

Question 2

What is plasma?

Answer 2

Ionized gas consisting of positive ions, a mix of electrons, and neutral particles.

Question 3

weight

Answer 3

The force gravity exerts on an object.

Question 4

Elements

Answer 4

Pure substances that cannot be broken down into a simpler from

Question 5

Compound

Answer 5

Two or more elements bounded together.

Question 6

Homogenous vs Heterogeneous mixture

Answer 6

1. uniform composition 2.non-uniform composition

Question 7

Define molecule

Answer 7

Two or more atoms held together by a chemical bond

Question 8

Physical change

Answer 8

Change in physical properties which does not affect chemical Identity.

Question 9

Chemical change

Answer 9

Change in chemical composition of a substance.

Question 10

Freiheit to Celsius equation

Answer 10

Tf=(9/5*Tc) + 32

Question 11

Celsius to Freiheit

Answer 11

Tc=5/9 (Tf-32)

Question 12

Periodic law

Answer 12

Elements with similar properties occur at regular intervals.

Question 13

ion

Answer 13

electrically charged particle(s).

Question 14

Anion vs cation

Answer 14

Anions are negatively charged, cation are positively charged.

Question 15

Molarity

Answer 15

=mol solute/ L solution

Question 16

Aqueous solution

Answer 16

Water is the primary solvent