Chemistry Quiz

Question 1

Funnel with glass wool

Answer 1

Buchner Funnel

Question 2

Burner

Answer 2

Bunsen Burner

Question 3

Ring to hold objects above fire

Answer 3

Iron ring

Question 4

Metal piece to hold object atop iron ring

Answer 4

wire gauze

Question 5

Physical changes

Answer 5

Reversible, no chemical bonds broken

Question 6

Chemical changes

Answer 6

Only reversible through another chemical change. Bonds are broken and reformed.

Question 7

Physical properties

Answer 7

Can be measured without changing anything

Question 8

Chemical properties

Answer 8

Matter can only be measured by a chemical reaction. Old matter destroyed, new matter formed. (Burning fuel)

Question 9

Evidence of a Reaction

Answer 9

Precipitate (solid forms, cloudy), bubbles (not boiling), color change, light, or heat

Question 10

Pure substances

Answer 10

Fixed ratio of atoms. Cannot be decomposed. (Elements, molecules, compounds)

Question 11

Mixtures

Answer 11

Homogeneous (uniform), Heterogeneous. No fixed ratio. Combination of pure substance, unfixed proportions.

Question 12

Molar mass

Answer 12

Sum of all elements atomic mass in grams

Question 13

Avogrado’s Number

Answer 13

6.022 x 10^23

Question 14

Empirical Formula

Answer 14

The simplest whole-number ratio of the atoms in a molecule, or ions in an ionic
compound.

Question 15

Molecular Formula

Answer 15

The number of atoms of each element in a
molecule of that compound