August 2022 Chemistry Regents Questions 11-20 Question Preview (ID: 61270)


Use Your Knowledge Of Chemistry To Answer All Questions In The Data Set. You May Need Your Chemistry Reference Tables And A Calculator To Answer Some Of The Questions. Good Luck. TEACHERS: click here for quick copy question ID numbers.

Which terms represent two categories of compounds?
a) chemical and physical
b) chemical and molecular
c) ionic and physical
d) ionic and molecular

When an atom of hydrogen and an atom of chlorine combine to form a molecule of hydrogen chloride, a bond is
a) formed as energy is absorbed
b) formed as energy is released
c) broken as energy is absorbed
d) broken as energy is released

All atoms of the element vanadium must have the same
a) atomic number
b) mass number
c) number of neutrons plus electrons
d) number of protons plus neutrons

Which sample of matter can be separated into two different substances by physical means?
a) liquid bromine
b) gaseous propane
c) solid sodium acetate
d) aqueous magnesium sulfate

Two liquids can be separated by distillation due to a difference in
a) concentration
b) conductivity
c) boiling point
d) heat of fusion

Which unit can be used to express the concentration of a PbCl2(aq) solution?
a) kelvins
b) kilojoules per gram
c) pascals
d) parts per million

Compared to the freezing point and boiling point of water at 1.0 atm, a 0.5 M aqueous solution of NaCl at 1.0 atm has
a) a lower freezing point and a lower boiling point
b) a lower freezing point and a higher boiling point
c) a higher freezing point and a lower boiling point
d) a higher freezing point and a higher boiling point

Which form of energy is converted to thermal energy when propane burns in air?
a) chemical
b) electrical
c) mechanical
d) nuclear

According to the kinetic molecular theory, which statement explains why an ideal gas can be compressed to a smaller volume?
a) The motion of the gas particles is circular and orderly.
b) The force of attraction between the gas particles is strong.
c) As the gas particles collide, the total energy of the system decreases.
d) The gas particles are separated by great distances relative to their size.

Under which conditions of temperature and pressure does a sample of propane behave least like an ideal gas?
a) 250. K and 1.0 atm
b) 250. K and 5.0 atm
c) 500. K and 1.0 atm
d) 500. K and 5.0 atm

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