Chapter 1 Pt 1
How many significant figures can the answer have?
(33.1 + 132.55) x 0.02 = ??
a. 3.313
b. 3
c. 3.31
d. 3.3130
b. 3
The nucleus of an atom contains _______.
a. Protons
b. Electrons
c. Neutrons
d. A and B
e. B and C
f. C and A
f. C and A
Which of the following is considered a mixture?
a. O3
b. Cr2O7
c. Air
d. Carbon monoxide
c. Air
Based on oxygen’s average atomic mass, which of the following isotopes of oxygen would you expect to be the most common?
a. Oxygen-18
b. Oxygen-13
c. Oxygen-16
d. Oxygen-12
c. Oxygen-16
The Law of Definite Proportions states that __________.
a. compounds such as NO and NO2 have identical chemical properties.
b. compounds such as NO and NO2 must have masses that are whole-number multiples of each other.
c. nitrogen and oxygen can combine to form a variety of compounds, such as NO or NO2.
d. the elements forming a given compound always react in the same proportions.
e. only one compound can be produced when two elements combine.
d. the elements forming a given compound always react in the same proportions.
The SI unit for mass is the ______.
a. Slug
b. Gram
c. Kilogram
d. Pound
c. Kilogram
Deposition is the change of a ______ to a ______.
a. Solid to Gas
b. Gas to Solid
c. Liquid to Gas
d. Gas to Liquid
b. Gas to Solid
An element has the form of 22688X. What is the element “X”?
a. C.
b. Ge.
c. U.
d. Ra.
d. Ra
Ions with a positive charge are referred to as ______.
a. Cations
b. Positrons
c. Anions
d. Nonmetals
a. Cations
_______ __________ was responsible for discovering protons in 1911 using the Gold Foil Experiment.
a. JJ Thomson
b. Ernest Rutherford
c. Demetri Mendeleev
d. James Chadwick
e. John Dalton
f. Niels Bohr
b. Ernest Rutherford
9.41 mg =
a. 941 g
b. 9.41 x 10-9 Mg
c. 9.41 x 102 ng
d. 9.41 x 10-6 hg
b. 9.41 x 10-9 Mg
The following data is for Zinc’s five naturally occurring isotopes: 64Zn (48.63%); 66Zn (27.90%); 67Zn (4.10%); 68Zn (18.75%); 70Zn (0.62%). Determine the average atomic weight of Zinc.
a. 67.00 amu.
b. 64.00 amu.
c. 65.47 amu.
d. 61.29 amu.
c. 65.47 amu
Which of the following is a metalloid?
a. Sulfur
b. Titanium
c. Carbon
d. Potassium
e. Boron
e. Boron
Bismuth is found on the Periodic Table at the intersection of period _____ and group _______.
a. 5A, 6
b. 5B, 6
c. 6, 5B
d. 6, 5A
e. 3A, 2
f. 3B, 2
g. 2, 3B
h. 2, 3A
d. 6, 5A
A(n) _______ property varies depending on how much of the substance is present.
a. Chemical.
b. Extensive.
c. Physical.
d. Intensive.
b. Extensive
A soda bottle is weighed empty, and is found to have a mass of 185 g. It is filled to the top with a liquid that has a density of 0.79 g/cm3. The filled bottle is weighed and found to have a mass of 411 g. What is the volume of the bottle in cm3?
a. 234 mL
b. 286 mL
c. 520 mL
d. 146 mL
e. 325 mL
f. 179 mL
b. 286 mL
How many significant figures would be represented in your final answer after the calculation 52.67 + 103.2750?
a. Two
b. Four
c. Five
d. Seven
c. Five
How many grams are in 2 moles C2H5N2?
a. 114 g
b. 62 g
c. 23 g
d. 20 g
e. 17 g
a. 114 g
What is the molecular weight of C2H5OH?
a. 29 g/mol
b. 30 g/mol
c. 46 g/mol
d. 83 g/mol
c. 46 g/mol
Who came up with an Atomic Theory in the first decade of the 19th century that includes four postulates about atoms and elements?
a. Ernest Rutherford
b. Niels Bohr
c. John Dalton
d. JJ Thomson
e. Demetri Mendeleev
f. James Chadwick
c. John Dalton
How many millimeters are in 0.301 ft?
a. 9.876 x 10-4 mm
b. 9.9 x 10-4 mm
c. 9.88 x 10-4 mm
d. 9.876 x 104 mm
e. 9.9 x 104 mm
f. 9.88 x 104 mm
g. 91.7 mm
h. 91 mm
i. 91.74 mm
g. 91.7 mm
What is freezing?
a. Exothermic
b. Endothermic
c. A chemical change
d. A rapid process
e. All of the above
a. Exothermic
How many atoms are in 23 moles of silver (Ag)?
a. 3.8 x 10-23 atoms Ag
b. 23 atoms Ag
c. 2.3 x 1023 atoms Ag
d. 1.4 x 1025 atoms Ag
d. 1.4 x 1025 atoms Ag
How many moles are in 581 grams of Li?
a. 581 mol
b. 83.7 mol
c. 6.94 mol
d. 100. mol
b. 83.7 mol
How many molecules are in 5 grams of H2O?
a. 6.022 x 1023 molecules
b. 5 molecules
c. 1.67 x 1023 molecules
d. 2.0 x 10-23 molecules
c. 1.67 x 1023 molecules