August 2022 Chemistry Regents Questions 11-20

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Which sample of matter can be separated into two different substances by physical means?

Two liquids can be separated by distillation due to a difference in

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

All atoms of the element vanadium must have the same

When an atom of hydrogen and an atom of chlorine combine to form a molecule of hydrogen chloride, a bond is

Which form of energy is converted to thermal energy when propane burns in air?

Under which conditions of temperature and pressure does a sample of propane behave least like an ideal gas?

Which unit can be used to express the concentration of a PbCl2(aq) solution?