WorksheetsChem1.Final
Total questions: 65
Worksheet time: 2hrs 10mins
Organic chemistry is the study of
properties, changes, and relationships between energy and matter.
the chemistry of living things.
crystals and minerals.
Carbon containing compounds
The two most important properties of all matter are
the
ability to carry an electric current well and to hold electric charge.
taking up space and having mass.
being brittle and hard.
being malleable and ductile.
The liquid state of matter can be described as
having definite shape and definite volume.
having neither a definite shape nor a definite volume.
having lost electrons owing to energy content.
having a definite volume but not a definite shape.
If a mixture is not uniform throughout, it is called
homogeneous
heterogeneous
chemically bonded
a solution
The vertical columns on the periodic table are called
periods
groups
rows
elements
A nonmetal is usually
brittle
malleable
a good conductor
used to make jewelry
The density of an object is calculated by
multiplying its mass times its volume.
dividing its mass by its volume.
dividing its volume by its mass.
adding its mass to its volume.
A chemist obtained the values 5.2246 g, 5.2353 g, and 5.2501 g for the mass of a sample. Without knowing the true mass of the sample, it can be said that these values have
good precision
good accuracy
poor precision
poor accuracy
Which of these measurements has been expressed to three significant figures?
0.052 g
0.202 g
3.065 g
500 g
The measurement 0.020 L is the same as
2.0 x 10-3 L
2.0 x 103 L
2.0 x 10-2 L
2.0 x 103 L
The average distance between the Earth and the moon is 386 000 km. Expressed in scientific notation, this distance is written as
386 x 103 km.
39 x 104 km.
3.9 x 105 km.
3.86 x 105 km.
The smallest unit of an element that can exist either alone or in combination with other such particles of the same or different elements is the
electron
neutron
proton
atom
The average atomic mass of an element is the average of the atomic masses of its
naturally occurring isotopes.
two most abundant isotopes.
radioactive isotopes.
artificial isotopes.
The mass of a sample containing 3.5 mol of silicon atoms (atomic mass 28.0855 amu) is approximately
28 g
35 g
72 g
98 g
The periodic law states that the properties of elements are periodic functions of their atomic numbers. What determines the position of each element in the periodic table?
mass number
number of neutrons
number of protons
number of isotopes
The electron configuration of aluminum, atomic number 13, is [Ne] 3s2 3p1. Aluminum is in Period
2
3
6
13
How many elements are in a period in which only the s and p sublevels are filled?
2
8
18
32
Because the first energy level contains only the 1s sublevel, the number of elements in this period is
1
2
4
8
The first member of the noble gas family, whose highest energy level consists of an octet of electrons, is
He
Ar
Ne
Kr
The electrons available to be lost, gained, or shared when atoms form compounds are called
ions
valence electrons
d electrons
electron clouds
The number of valence electrons in Group 1 elements is
1
2
4
8
In the three molecules, O2, HCl, and F2, what atom would have a partial negative charge?
oxygen
hydrogen
chlorine
fluorine
What is the Chemical symbol for boron?
A
B
C
Don't pick D
A chemical bond formed by the attraction between positive ions and surrounding mobile electrons is a(n)
nonpolar covalent bond.
ionic bond.
polar covalent bond.
metallic bond.
The shiny appearance of a metal is most closely related to the metal's
highly mobile valence electrons.
covalent bonds.
brittle crystalline structure.
positive ions.
A polar molecule contains
ions
a region of positive charge and a region of negative charge.
only London forces.
no bonds
Name the compound N2O3.
dinitrogen oxide
nitrogen trioxide
dinitrogen trioxide
nitric oxide
Name the compound N2O2
dinitrogen monoxide
nitrogen dioxide
nitrogen oxide(II)
dinitrogen dioxide
What is the formula mass of (NH4)2SO4?
114.09 amu
118.34 amu
128.06 amu
132.16 amu
The molar mass of CCl4 is 153.81 g/mol. How many grams of CCl4 are needed to have 5.000 mol?
5 g
30.76 g
769.0 g
796.05 g
What is the percentage composition of CuCl2?
33% Cu, 66% Cl
50% Cu, 50% Cl
65.50% Cu, 34.50% Cl
47.27%Cu, 52.73% Cl
In writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is
2H
H
H2.
OH
A chemical equation is balanced when the
coefficients of the reactants equal the coefficients of the products.
same number of each kind of atom appears in the reactants and in the products
products and reactants are the same chemicals.
subscripts of the reactants equal the subscripts of the products
When the equation Fe3O4 + Al ---> Al2O3 + Fe is correctly balanced, what is the coefficient of Fe?
3
4
6
9
In what kind of reaction do the ions of two compounds exchange places in aqueous solution to form two new compounds?
synthesis reaction
double-displacement reaction
decomposition reaction
combustion reaction
The reaction represented by the equation Mg(s) + 2HCl(aq) --> H2(g) + MgCl2(aq) is a
composition reaction.
decomposition reaction.
single-displacement reaction.
double-displacement reaction.
What is the study of the mass relationships among reactants and products in a chemical reaction?
stoichiometry
composition
electron configuration
periodic law
The coefficients in a chemical equation represent the
masses, in grams, of all reactants and products.
relative numbers of moles of reactants and products.
number of atoms in each compound in a reaction.
number of valence electrons involved in the reaction.
The units of molar mass are
g/mol
mol/g
amu/mol
mol/amu
In the reaction represented by the equation N2 + 3H2 --> 2NH3, what is the mole ratio of hydrogen to ammonia?
1:1
2:1
3:2
6:8
For the reaction represented by the equation 2H2 + O2 --> 2H2O, how many grams of water are produced from 6.00 mol of hydrogen?
2 g
4 g
54 g
108 g
What is the ratio of the actual yield to the theoretical yield, multiplied by 100%?
mole ratio
percentage yield
avogadro yield
potato salad
Which gases behave most like an ideal gas?
gases composed of highly polar molecules
gases composed of monatomic, nonpolar molecules
gases composed of diatomic, polar molecules
gases near their condensation temperatures
The compressibility of a liquid is generally
less than that of a gas.
more than that of a gas.
equal than that of a gas.
zero
The energy of the particles in a solid is
higher than the energy of the particles in a gas.
high enough to allow the particles to interchange with other particles
higher than the energy of the particles in a liquid.
lower than the energy of the particles in liquids and gases
Standard pressure is the pressure exerted by a column of mercury exactly
273 mmHg
760 mmHg
760 cmHg
1 m Hg
A mixture of four gases exerts a total pressure of 860 mm Hg. Gases A and B each exert 220 mm Hg. Gas C exerts 110 mm Hg. What pressure is exerted by gas D?
165 mmHg
310 mmHg
860 mmHg
220 mmHg
A sample of oxygen occupies 560. mL when the pressure is 800.00 mm Hg. At constant temperature, what volume does the gas occupy when the pressure decreases to 700.0 mm Hg?
80 mL
490 mL
600 mL
640 mL
Chlorine is produced by the reaction 2HCl(g) H2(g) + Cl2(g). How many grams of HCl (36.5 g/mol) must be used to produce 10.0 L of chlorine at STP?
15.8 g
30.2 g
32.6 g
36.5 g
Which is an example of a colloid?
paint
smoke
butter
sugar water
A substance whose water solution is a good conductor of electricity is a(n)
nonelectrolyte
electrolyte
nonpolar substance
solute
Which of the following expresses concentration?
molality
molarity
moles of solute per liter of solution
all of the above
Which acid is found in vinegar?
acetic
nitric
phosphoric
hydrochloric
H2O is
always an acid
always a base
water
don't pick a or b and especially d
If [H3O+] of a solution is greater than [OH–], the solution
acidic
basic
neutral
all of the above
What is the pH of a 10–4 M HCl solution?
4
6
8
10
What is the pH of a 10–5 M KOH solution?
3
5
9
11
What is the pH of a 0.001 62 M NaOH solution?
3.841
5.332
9.923
11.210
If 72.1 mL of 0.543 M H2SO4 completely titrates 39.0 mL of KOH solution, what is the molarity of the KOH solution?
0.317 M
0.502 M
1.00 M
2.01 M
If 114 mL of 0.008 04 M NaOH completely titrates 118 mL of H3PO4 solution, what is the molarity of the H3PO4 solution?
0.002 59 M
0.005 18 M
0.007 77 M
0.0105 M
How much energy does a copper sample absorb as energy in the form of heat if its specific heat is 0.384 J/(g·°C), its mass is 8.00 g, and it is heated from 10.0°C to 40.0°C?
0.0016 J/(g·°C)
0.0016 J
92.2 J
92.2 J(g·°C)
If the concentration of reactants is higher,
the reaction rate is generally higher.
the reaction rate is generally lower.
the reaction rate is not affected.
the rate-determining step is eliminated.
How many covalent bonds can a carbon atom usually form?
2
3
4
5
Isomers are compounds that have
the same molecular formula but different structures.
the same molecular formula and the same structure.
different molecular formulas and different structures
different molecular formulas but the same structure
Hydrocarbons in which carbon atoms form only single bonds and are arranged in a ring are called
cycloalkanes
alkanes
alkynes
alkenes
