Chemistry
Study Guide Test 1
Chapters 1-3
Name:__________________________________________________________
1) Convert 240 Celsius to Kelvin. (pg. 19)
2) Carry out the following calculations and state each result with the
correct number of significant figures: (pg. 22)
a) 14.55 cm – 135.5 cm
b) (175.5g – 143.5g)/(187.5 mL – 165.3 mL)
3) Write the chemical formula of the compound whose molecules contain
(1.13)
a) four atoms of chlorine and one atom of carbon
b) two atoms of oxygen and two atoms of hydrogen
c) four phosphorus atoms and ten oxygen atoms
4) What are the names and the chemical symbols of the elements that are
vertical and horizontal neighbors of sulfur in the periodic table? Which
of these have chemical properties similar to those of sulfur? (1.17)
5) Name two metals that react with bromine to give compounds with the
chemical formula MBr. (1.19)
6) Classify each of the following as a chemical or a physical transformation:
(1.27)
a) formation of frost
b) drying of clothes
c) burning of leaves
7) The mass unit most commonly used for precious stones is the carat.
(1 carat = 3.168 grains, and 1 gram = 15.4 grains.) Find the total mass in
kilograms of a ring that contains a 5.0 x 10-1carat diamond and 7.00 grams
of gold. (1.35)
8) What is the mass of 1 quart of water (1 L = 1.057 quarts)? (1.37)
9) A plastic block measures 15.5 cm by 4.6 cm by 1.75 cm, and its mass is
98.456 g. Compute the density of the block. (1.39)
10)
In a gas discharge tube containing hydrogen gas, a total charge of
2.44 x 10-12 C is measured at the collector. Assume that this charge is
entirely due to the protons. (a) How many protons is this? (b) What
mass does this number of protons have? (2.14)
11) How many protons, neutrons and electrons are contained in each of the
following atoms or ions: (2.19)
(a) 16 8O2(b) 115B
(c) 5525Mn3+
(d) 3517Cl212) Calculate the number of moles in the following: (2.33)
(a) 7.85 g of Fe
(b) 4.68 mg of Si
13) Determine which of the following substances are ionic: (pg. 79)
CCl4
CaCl2
Li
Co(NO3)2
14) Understand how to read structural formulas and determine line
structure and chemical formulas. See 3.5 on pg. 105, 3.7 on pg. 106
15) Name the following compounds: (3.15)
(a) S2Cl2
(b) IF7
(c) HBr
(d) N2O3
(e) SiC
16) Calculate the molar mass of the following substances: (3.25)
(a) carbon tetrachloride
(b) potassium sulfide
c) O3
(d) lithium bromide
17) One carrot may contain 0.75mg of vitamin A (C20H30O). How many
moles of Vitamin A is this? How many molecules? How many hydrogen
atoms are in 0.75 mg of vitamin A? What mass of hydrogen is this? (3.33)
18) Tooth enamel is composed largely of hydroxyapatite, which has the
following mass percent composition:
O: 41.41%
P: 18.50%
H: 0.20%
Ca: 39.89%
What is the empirical formula of hydroxyapatite? The molar mass is
1004 g/mol. What is the molecular formula of hydroxyapatite? (3.38)