Chemistry Exam 1 Review

Density

100

A piece of aluminum foil has a mass of 3.23 g and a volume of 14.6 mL. What is the density of the piece of aluminum foil?

0.221 g/mL

200

A copper sphere has a volume of 0.89 cm^3 and a density of 0.43 g/cm^3. What is the mass of the copper sphere?

0.38 g

300

A silver remnant has a mass of 29 g and a density of 0.18 g/mL. What is the volume of the silver remnant?

160 mL

400

 A graduated cylinder is filled with water to hold 22.5 mL. A piece of gold is placed within the flask and the water level rises to 56.7 mL. If the density of the gold is 0.34 g/mL, what is the mass of the gold?

12 g

500

A block of silver has a mass of 44.45 grams and a density of 0.289 g/mL. The block of silver is placed within a graduated cylinder. If the volume of the water and silver together is 200. mL, what is the volume of water in the graduated cylinder?

46.0 mL

Significant Figures

100

How many significant figures in 7.086?

4

200

How many significant figures are in 0.00023?

2

300

How many significant figures in 4,860?

3

400

Solve: 18.3 + 2.41789

20.7

500

Solve: 390 x 41.62

1600 OR 1.6 x 10^4

Unit Conversion

100

Convert 856 g to kg

0.856 kg

200

Convert 45.3 km to nm

4.53 x 10^13 nm

300

Convert 3.0 years to seconds. 

9.5 x 10^7 seconds

400

Convert 43.2 mph to m/sec (given: 1 mile=1.6 km)

19.2 m/sec

500

Convert 0.769 g/cm^3 to kg/m^3

769 kg/m^3

Naming

100

What is the formula for carbon tetrachloride? Is the molecule ionic or covalent?

CCl₄, covalent. 

200

What is the formula for sodium oxide?

Na₂O, ionic. 

300

What is the formula for perbromic acid?

HBrO₄, acidic. 

400

What is the formula for iron (3) fluoride?

FeF₃, ionic. 

500

What is the formula for ammonium sulfite?

(NH₄)₂SO₃, ionic

Terminology and Ch 19

100

Balance the following equation:

²²₁₁Na--> ²²₁₀Ne + X

X: ⁰₊₁e OR ⁰₊₁ beta

200

Balance the following equation:

²³³₉₂U --> ²²⁹₉₀Th + X

X= ⁴₂alpha

300

What is the difference between intensive and extensive properties?

Intensive properties= Do not depend on the amount of the substance in question. Ex: color, temperature, boiling point, density. 

Extensive properties= Depends on the amount of the substance in question. Ex: mass, volume, weight, length, size. 

400

What was the significance of Rutherford's experiment?

Gold foil experiment--> atoms are concentrated in the nucleus. Protons and electrons have opposite charges. 

500

What is the difference between an acid and a base?

Acid= Yields H⁺ ions when dissolved in water (ex= HCl.)

Base= Yields OH^- ions when dissolved in water (ex= NaOH.)