Test 1 Review
1. All pure substances are either:
e) a & d
2. Match the following element names to their symbols:
3. At room temperature and atmospheric pressure, the element iodine is best
a) A diatomic gas
b) A monatomic gas
c) A crystalline solid
d) A polyatomic liquid
e) None of the above
4. For each of the following identify whether the substance is a solution,
heterogeneous mixture, homogeneous mixture, pure substance, element or
compound (NOTE: more than one label can apply to a single substance)
b) Rubbing Alcohol
e) Wishbone Italian Salad Dressing
5. How many significant figures are in each of the following numbers?
6. Round each of the following numbers to four significant figures, and express the
result in standard exponential notation:
7. Carry out the following operations, and express the answers with the appropriate
number of significant figures.
a) 952.7 - 140.7389
b) 296 x 32.456
c) [(285.3 x 105) – (1.200 x 103)] x 2.8954
d) (0.0054 x 20,000.0) + (2813 x 12)
8. If a woman has a mass of 115 lb, what is her mass in grams?
9. Perform the following conversions: (454 g = 1 lb, 1 ton = 2000 lbs.)
a) 23.5 tons to mg
b) The mass in grams of 6.00 gallons of a liquid with a density of 0.917 g/mL (1 L =
10. J.J. Thompson discovered:
11. R.A. Milliken discovered:
12. Using his gold foil experiment Ernest Rutherford came to what three conclusions?
1. Name the following ionic compounds:
2. Write the formulas of the following ionic compounds:
a) lithium acetate
b) iron (II) phosphate
c) calcium bromide
d) copper (II) chlorate
e) cobalt (III) chromate
3. Name the following acids:
4. Write the formulas of the following acids:
a) hydrofluoric acid
b) carbonic acid
c) nitrous acid
5. Name the following molecular compounds:
6. Write the formulas of the following molecular compounds:
a) carbon monoxide
b) Dinitrogen monoxide
c) Carbon tetrabromide
d) Phosphorus pentabromide
7. Find the formula weights and molar masses of the first three ionic compounds we
8. Find the molecular weights and molar masses of the first three molecular
compounds we named.
9. A sample of the male sex hormone testosterone, C19H28O2, contains 7.08 x 1020
a) How many atoms of carbon does it contain?
b) How many molecules of testosterone does it contain?
c) How many moles of testosterone does it contain?
d) What is the mass of this sample in grams?
10. What kind of reactions are the following? Balance:
a) C3H8+ O2 CO2+ H2O
b) CaCl2+ AgNO3 AgCl + Ca(NO3)2
c) KClO3 KCl+ O2
11. Find the empirical formula of a compound with a percent composition of: 40.00
% C, 6.72 % H, 53.29 % O. Suppose we knew that the molecular weight of this
compound was 180 g/mol, what would its molecular formula be?
1. An atom of the most common isotope of gold, 197Au, has ____ protons, ____ neutrons,
and ____ electrons.
a) 79, 118, 118
b) 197, 79,118
c) 79,197, 197
d) 79, 118, 79
e) 118, 79, 39
2. The combustion of 28.8 g of ammonia according to the following reaction consumes
________ g of O2?
4NH3 (g) + 7 O2 (g) 4 NO2 (g) +6H2O (g)
a) 94.65 d) 74.7
b) 94.7 e) 66.83