Midterm Review- Unit 1

Midterm Review- Unit 1

1. Convert the following:

a.  24.5L = ______cL

b.  67mg= ______kg

c.  892 hm = ______m

2. How many sig figs in each number?

a.  0.0000247

b.  0.300

c.  110.00

d.  9.010 x10-6

3. Rewrite each number to the number of sig figs in (parenthesis).

a.  6.02 x 10-4 (2)

b.  0.00532007 (4)

c.  3.681076 (3)

4. Calculate the following using the correct rules.

a.  35.6 g + 4.31 g =

b.  340 cm – 0.02 cm =

c.  0.0300 kg + 212.0g =

d.  4.681 g / 5.2 cm3 =

e.  (3x103 m) x (6.0x104 m) =

5. Convert the following from scientific notation to standard or vice versa.

a.  7.4x 10-3

b.  0.054x105

c.  623,000

d.  0.000019

6. Solve the following density problems using sig figs.

a.  What is the mass in grams of 25 mL of oxygen gas if its density is 1.43 g/L?

b.  A gas is confined to a rectangular tank 25.0 cm long, 8.0 cm high and 10.4 cm wide. If the density of the gas is 19.3 g/L, what is the mass of the gas?

7. Decide what term correctly belongs with the description.

a.  Anything that has mass and takes up space

b.  The amount of matter an object contains

c.  Indefinite shape, definite volume

d.  Indefinite shape, indefinite volume

e.  Definite shape, definite volume

f.  Solid to gas

g.  Gas to liquid

h.  Liquid to solid

i.  Liquid to gas

j.  Solid to liquid

k.  Separation of 2 liquids by boiling

l.  Separation of a heterogeneous mixture by a porous barrier

m.  Separation of a homogeneous mixture by formation of solid, pure particles

8. Homo, Hetero, Element, Compound

a.  Cough Syrup

b.  Iron

c.  Chocolate chip ice cream

d.  Ammonia (NH4)

e.  Mercury

f.  Ink

9. Physical or chemical

a.  Brittle

b.  Reacts vigorously with fluorine

c.  Tearing

d.  Corrosive

e.  Bread dough rises when yeast is added

f.  Salt dissolves in