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1) The length of the side of a cube having a density of 12.6 g/ml and a mass of 7.65 g is
________ cm.
A) 3.20
B) 0.847
C) 1.02
D) 0.584
E) 1.32
2) A 5.00-g sample of copper metal at 25.0 °C is heated by the addition of 133 J of
energy. The final temperature of the copper is ________°C. The specific heat capacity
of copper is 0.38 J/g-K.
A) 35.1
B) 25.0
C) 45.0
D) 95.0
E) 70.0
3) Which solution has the same number of moles of KCl as 75.00 mL of 0.250 M
solution of KCl?
A) 20.0 mL of 0.200 M solution of KCl
B) 25.0 mL of 0.175 M solution of KCl
C) 129 mL of 0.145 M solution of KCl
D) 50.0 mL of 0.125 M solution of KCl
E) 100 mL of 0.0500 M solution of KCl
4) The arrangement of oxygen atoms around a silicon atom in SiO4
4- is ________.
A) square planar
B) octahedral
C) linear
D) tetrahedral
E) trigonal pyramidal
5) The hybridization of the terminal carbons in the molecule is ________.
A) sp
B) sp2
C) sp3
D) sp3d
E) sp3d2
6) One mole of ________ contains the smallest number of atoms.
A) S8
B) C10H8
C) Al2(SO4)3
D) Na3PO4
E) NaCl
7) The value of ΔH° for the reaction below is -1107 kJ:
2Ba (s) + O2 (g) → 2BaO (s)
How many kJ of heat are released when 15.75 g of Ba (s) reacts completely with
oxygen to form BaO (s)?
A) 20.8 kJ
B) 63.5 kJ
C) 114 kJ
D) 70.3 kJ
E) 35.1 kJ
8) Of the elements below, ________ is the most metallic.
A) sodium
B) barium
C) magnesium
D) calcium
E) cesium
9) Zinc reacts with aqueous sulfuric acid to form hydrogen gas:
Zn (s) + H2SO4 (aq) → ZnSO4 (aq) + H2 (g)
In an experiment, 177 mL of wet H2 is collected over water at 27 °C and a barometric
pressure of 766 torr. The vapor pressure of water at 27 °C is 26.74 torr. The partial
pressure of hydrogen in this experiment is ________ atm.
A) 0.972
B) 739
C) 1.01
D) 793
E) 1.04
10) The root-mean-square speed of CO at 113 °C is ________ m/s.
A) 317
B) 58.3
C) 586
D) 993
E) 31.5
