August 2019 Chemistry Regents Questions 11-20 Question Preview (ID: 59714)


Use Your Knowledge Of Chemistry To Answer All Questions In The Data Set. You Will 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 element has metallic bonds at room temperature?
a) bromine
b) cesium
c) krypton
d) sulfur

What is the number of electrons shared between the atoms in a molecule of nitrogen, N2?
a) 8
b) 2
c) 3
d) 6

What occurs during this reaction?
a) A bond is broken and energy is absorbed.
b) A bond is broken and energy is released.
c) A bond is formed and energy is absorbed.
d) A bond is formed and energy is released.

An atom of which element has the strongest attraction for electrons in a chemical bond?
a) chlorine
b) carbon
c) phosphorus
d) sulfur

At STP, a 50.-gram sample of H2O(l) and a 100.-gram sample of H2O(l) have
a) the same chemical properties
b) the same volume
c) different temperatures
d) different empirical formulas

Which statement describes a mixture of sand and water at room temperature?
a) It is heterogeneous, and its components are in the same phase.
b) It is heterogeneous, and its components are in different phases.
c) It is homogeneous, and its components are in the same phase.
d) It is homogeneous, and its components are in different phases.

Distillation is a process used to separate a mixture of liquids based on different
a) boiling points
b) densities
c) freezing points
d) solubilities

According to the kinetic molecular theory, which statement describes the particles in a sample of an ideal gas?
a) The particles are constantly moving in circular paths.
b) The particles collide, decreasing the total energy of the system.
c) The particles have attractive forces between them.
d) The particles are considered to have negligible volume.

Which sample of matter has the greatest distance between molecules at STP?
a) N2(g)
b) NH3(aq)
c) C6H14(l)
d) C6H12O6(s)

For a chemical system at equilibrium, the concentrations of both the reactants and the products must
a) decrease
b) increase
c) be constant
d) be equal

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