All of the following are properties of oxygen gas. Which one is a physical property?
All of the following are properties of oxygen gas. Which one is a physical property?
Ait supports combustion
Bit condenses to a liquid at -219 C and atmospheric pressure
Cit causes iron to rust
Dit reacts with calcium to produce CaO
Eall of these are physical properties
Which mixture is incorrectly labeled?
Ahomogeneous/sugar dissolved in water
Bhomogeneous/sand stirred into water
Cheterogeneous/orange juice with pulp
Dheterogeneous/chocolate chip cookie
Eheterogeneous/concrete sidewalk
Perform the indicated mathematical operations and express the answer in scientific notation rounded off to the proper number of significant figures:
(8.001 X 102) X (2.88 X 103 / 2.4 X 10-3) =
A9.6 X 102
B9.60 X 108
C9.601 X 108
D9.6 X 108
E9.6 X 10-2
How many kilograms of lead are there in 749 pounds of lead (1lb = 453.6g)?
A95.1 kg
B340 kg
C760 kg
D28.0 kg
E1650 kg
A gold ring has a mass of 15.37 g. If this ring is pure gold (density = 16.1g/mL), what would the volume of the ring be?
A15.37 ml
B1.04 ml
C0.955 ml
D16.1 ml
E8.05 ml
Gallium, a metal, has a freezing point near room temperature so it can be melted by holding it in your hands. If gallium’s melting point is 302.8 K, what is that temperature in C?
A0.0 C
B575.8 C
C302.8 C
D39.8 C
E29.8 C
What is the correct formula for the carbonate ion?
ACH3COO-
BCl-
CCO22-
DCO32-
E(COO-)2
Calculate the molar mass of NaHSO4.
A193 amu
B104 amu
C120 amu
D215 amu
E185 amu
What is the mass of 2.2 X 109 CO2 molecules?
A9.7 X 1010 g
B1.0 X 10-12 g
C1.2 X 10-14 g
D4.4 X 10-14 g
E1.6 X 10-13 g
What is percent by mass of sulfur in Al2(SO4)3?
A9.38%
B18.8%
C24.6%
D28.1%
E35.4%
A sample of a compound containing nitrogen, hydrogen, and oxygen is found to contain 22.2% nitrogen and 1.59% hydrogen. What is the empirical formula for this compound?
AHNO
BH2N2O3
CH2NO3
DHNO2
EHNO3
What is the coefficient for HBr when the following equation is balanced with the smallest whole number coefficients?
Br2 + H2O -> HBr + HBrO3
A5
B7
C8
D3
E6
How many moles of O2 are required to burn completely 63.5 g of C6H6, according to the following equation?
2C6H6 + 15O2 -> 12CO2 + 6H2O
A0.814
B12.2
C6.1
D0.109
E9.21
Calculate the molarity of a solution that contains 70.0 g of H2SO4 in 280. mL of solution.
A2.55 M
B6.84 M
C8.62 M
D9.78 M
E11.84 M
A laboratory stock solution is 1.50 M NaOH. Calculate the volume of this stock solution that would be needed to prepare 300. mL of 0.200 M NaOH.
A2.25 ml
B10.0 ml
C40.0 ml
D1.00 ml
E0.100 ml
Give the number of protons, neutrons, and electrons in a atom of the 90Sr isotope.
A38 p; 38n; 38 e
B38p; 90n; 38 e
C52p; 38n; 52e
D38p; 52n; 38e
E90p; 38n; 90e
Consider the following statements about atomic structure. Which is true?
AIsotopes of an element differ only in the number of protons
BThe number of protons in an atom is the atomic number
CThe mass number of an atom is the sum of the number of protons plus electrons in the atom
DThe volume occupied by the nucleus of an atom represents a large percentage of the total volume of the atom
EThe atomic number is the same as the mass number for most elements
The orientation in space of an atomic orbital is designated by which quantum number?
An
Bl
Cml
Dms
Epsi
The electron configuration 1s22s22p63s23p64s23d6 represents the element ______.
A
Mn
B
Se
C
Fe
DCo
EKr
An element that has four valence electrons in its outermost energy shell is _______.
ANb
BMo
CSn
DZr
ES
___ is a noble gas.
A22Ti
B42Mo
C81Tl
D54Xe
E92U
Which has the largest atomic radius?
AB
BAl
CGa
DIn
ETl
Which element has the lowest first ionization energy?
AF
BCl
CBr
DI
EAt
Which ion has the smallest radius?
AK+
BCs+
CSr2+
DBa2+
EAl3+
Which of the following responses contains all the true statements and no others?
I. The elements at the top right area of the periodic table, except the noble gases, have the greatest tendency to form anions.
II. The elements with the least tendency to form ions are those at the far left of the periodic table.
III. Bonds in compounds consisting of two neighboring or adjacent elements at the top right area of the periodic table are likely to be covalent.
IV. The elements at the far left of the periodic table possess poor electrical conductivity.
AI and III
BI, II and IV
CII and IV
DI, II and III
EIV
Write the balanced chemical equation for the complete neutralization of dilute H2SO4 with KOH in aqueous
solution. What is the sum of the coefficients? (Do not forget coefficients of one.)
A6
B8
C9
D4
E5
Which molecule exhibits resonance?
ABeI2
BO3
CH2S
DPCl3
ECO2
Which molecule contains the least polar bonds?
(Electronegativities: H = 2.1, C = 2.5, F = 4.0, Cl = 3.0, Br = 2.8, I = 2.5)
ACF4
BCCl4
CCBr4
DCI4
ECH4
Which of the following molecules is nonpolar?
AH2O
BCO2
CCSO
DNF3
ENH3
The hybridization associated with the central atom of a molecule in which all the bond angles are 109.5 is _____________
Asp
Bsp2
Csp3
Dsp3d
Esp3d2
The electron geometry of the central atom in PCl3 is _____.
Apyramidal
Btrigonal planar
Ctetrahedral
Doctahedral
Etrigonal bipyramidal
If the volume of a sample of Ne is tripled while the temperature is held constant, what happens to the pressure of the gas?
Ait triples
Bit stays the same
Cit doubles
Dit’s 1/3 the pressure
Eit’s 1/2 the pressure
A gas sample occupies 4.20L under pressure of 800 torr at 350 K. At what temperature will it occupy 3.60 L at the same pressure?
A770 C
B300 K
C408 K
D300 C
E770 K
A sample of NO2 occupies 11,200 ml at STP. What is the mass of the sample?
A21.0 g
B18.6 g
C23.0 g
D38.6 g
E42.4 g
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