Chapter 1
Rank the following prefixes in order of increasing size of the number they represent: centi-, giga-, nano-, and kilo-.
nano, centi, kilo, giga
Define the term isotope
same # of protons; different # of electrons
Balance the following equation:
CS2 + Cl2 → CCl4 + S2Cl2
CS2 + 3Cl2 → CCl4 + S2Cl2
Define limiting reactant
The reactant that is fully used up first
Convert 1.69 atm to mmHg
1284.4 mmHg
Express each of the following temperatures in kelvins:
(a) −10.°C
(b) 0.00°C
(c) 280.°C
a) 263 K
b) 273K
c) 553K
What is the difference between an ionic bond and a covalent bond
Ionic = transfer of electrons
Covalent = sharing of electrons
Which symbols are used to indicate solids, liquids, gases, and aqueous solutions in chemical equations?
s; l; g; aq
If 3.4 mol Al and 6.2 mol Fe2O3 are mixed, what is the limiting reactant?
2 Al + Fe2O3 → Al2O3 + 2 Fe
Al
A gas cylinder has a volume of 5.6 L at a pressure of 1 atm. According to boyles law, what should happen to my volume if the pressure is increased to 5 atm? (increase or decrease)
decrease
Express each of the following numbers in scientific notation:
(a) 62.13
(b) 0.000414
(c) 0.0000051
(d) 871,000,000
(e) 9100
a) 6.213x101
b) 4.14x10-4
c) 5.1x10-6
d) 8.71x108
e)9.1x103
Name the following covalent compounds:
(a) N2O5
(b) S2Cl2
(c) NBr3
(d) P4O10
a) dinitrogen pentoxide
b) disulfur dicholoride
c) mononitrogen tribormide
d) tetraphosphorus decoxide
Find the net ionic and spectator ions for the following reaction:
AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
Ag+ (aq) + Cl- (aq) --> AgCl (s)
Spectators: Na+ and NO3-
How many grams of Fe are produced?
2 Al + Fe2O3 → Al2O3 + 2 Fe
189.89 g Fe
What is the pressure occupied by 0.150 mol of nitrogen gas at 27°C occupying a volume of 2.00 L
1.85 atm
3.47 × 10-6 g to µg
3.47 µg
Write the formula units of the following ionic compounds:
(a) copper(II) sulfide
(b) barium chloride
(c) iron(III) nitride
(d) titanium(IV) bromide
a) CuS
b) BaCl2
c) FeN
d)TiBr4
93 g CO2
convert to mols
2.11 mol CO2
When performing a recovery of copper sulfate in the lab a student recovered 1.65 g from the original 4.30 g. What is their percent error?
38.37% recovered
There are 6 mol of NO2 (g) at STP. How many liters of gas are there?
134.4 L
If a vehicle is traveling 92 m/s, what is its velocity in miles per hour? (0.62 miles = 1.00 km)
205.344 mi/hr
The element gallium, used in gallium arsenide semiconductors, has an atomic mass of 69.72 amu. There are only two isotopes of gallium, 69Ga with a mass of 68.9257 amu and 71Ga with a mass of 70.9249 amu. What are the isotopic abundances of gallium?
69Ga = 60.3%
71Ga = 39.7%
72.7% Sb, 28.3% S
Write the empirical formula
Sb2S3
Which of the following gases will diffuse at the fastest rate?
He, Cl2, CO2, H2, O2
**Bonus: rank from slowest to fastest
H2
**Cl2, CO2, O2, He, H2