Column #1
The element in Group 14, Period 3, of the Periodic Table is classified as a
(1) metal
(2) noble gas
(3) metalloid
(4) nonmetal
(3) metalloid
Which formula represents a hydrocarbon?
(1) CO2
(2) C3H8
(3) C2H4O2
(4) C3H8O
(2) C3H8
4 Which equation represents a physical change?
(1) H2(g) + I2(g) → 2HI(g)
(2) N2(g) + 2O2(g) → 2NO2(g)
(3) I2(s) → I2(g)
(4) 3O2(g) → 2O3(g)
(3) I2(s) → I2(g)
Which term identifies a factor that will shift a chemical equilibrium?
(1) atomic radius
(2) catalyst
(3) decay mode
(4) temperature
(4) temperature
If two atoms are isotopes of the same element, the atoms must have
(1) the same number of protons and the same number of neutrons
(2) the same number of protons and a different number of neutrons
(3) a different number of protons and the same number of neutrons
(4) a different number of p
(2) the same number of protons and a different number of neutrons
Which indicator is blue in a solution that has a pH value of 7.0?
(1) bromcresol green
(2) methyl orange
(3) phenolphthalein
(4) thymol blue
(1) bromcresol green
According to Table F, which compound has a very low solubility in water?
(1) sodium carbonate
(2) sodium sulfide
(3) calcium hydroxide
(4) calcium phosphate
(4) calcium phosphate
Which compound is saturated?
(1) butane
(2) ethene
(3) heptene
(4) pentyne
(1) butane
Which element is classified as a metalloid?
(1) Cr
(2) Cs
(3) Sc
(4) Si
(4) Si
Which change in electron location in an atom of calcium is accompanied by the greatest amount of energy emitted?
(1) from shell 1 to shell 2
(2) from shell 2 to shell 1
(3) from shell 1 to shell 4
(4) from shell 4 to shell 1
(4) from shell 4 to shell 1
Which element is malleable at STP?
(1) chlorine
(2) copper
(3) helium
(4) sulfur
(2) copper
Which substance is an Arrhenius acid?
(1) H2
(2) HCl
(3) KCl
(4) NH3
(2) HCl
What is the number of protons in an atom with the electron configuration of 25?
(1) 5
(2) 2
(3) 3
(4) 7
(4) 7
What is the vapor pressure of water at 90.°C?
(1) 40. kPa
(2) 68 kPa
(3) 94 kPa
(4) 150. kPa
(2) 68 kPa
Which two terms represent types of chemical formulas?
(1) empirical and molecular
(2) polar and nonpolar
(3) synthesis and decomposition
(4) saturated and concentrated
(1) empirical and molecular
Which type of reaction occurs when an Arrhenius acid reacts with an Arrhenius base to form a salt and water?
(1) combustion
(2) decomposition
(3) neutralization
(4) saponification
(3) neutralization
As an atom in the ground state changes to an atom in an excited state, the atom
(1) absorbs energy
(2) releases energy
(3) increases in mass number
(4) decreases in mass number
(1) absorbs energy
What is the gram-formula mass of Mg(NO3)2?
(1) 86 g/mol
(2) 134 g/mol
(3) 148 g/mol
(4) 172 g/mol
(3) 148 g/mol
Which term represents the sum of the atomic masses of the atoms in a molecule?
(1) atomic number
(2) mass number
(3) formula mass
(4) percent composition by mass
(3) formula mass
Which statement describes an electrolyte?
(1) An electrolyte conducts an electric current as a solid and dissolves in water.
(2) An electrolyte conducts an electric current as a solid and does not dissolve in water.
(3) When an electrolyte dissolves in water, the resulting solution conducts an electric current.
(4) When an electrolyte dissolves in water, the resulting solution does not conduct an electric current.
(3) When an electrolyte dissolves in water, the resulting solution conducts an electric current.