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500

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

500

Which formula represents a hydrocarbon?

(1) CO2 

(2) C3H8 

(3) C2H4O2 

(4) C3H8O

(2) C3H8 

500

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)

500

Which term identifies a factor that will shift a chemical equilibrium?

(1) atomic radius 

(2) catalyst 

(3) decay mode

(4) temperature

(4) temperature

500

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

500

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 

500

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

500

Which compound is saturated?

(1) butane 

(2) ethene 

(3) heptene

(4) pentyne

(1) butane 

500

Which element is classified as a metalloid?

(1) Cr

(2) Cs 

(3) Sc  

(4) Si

(4) Si

500

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

500

Which element is malleable at STP?

(1) chlorine 

(2) copper 

(3) helium 

(4) sulfur


(2) copper 

500

Which substance is an Arrhenius acid?

(1) H2

(2) HCl 

(3) KCl

(4) NH3

(2) HCl 

500

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

500

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 

500

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 

500

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

500

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 

500

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

500

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 

500

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.