August 2018 Chemistry Regents Questions 31-40 Question Preview (ID: 59741)


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.

What is the net charge of an ion that has 11 protons, 10 electrons, and 12 neutrons?
a) 1+
b) 2+
c) 1-
d) 2-

Which electron configuration represents the electrons of an atom in an excited state?
a) 2-5
b) 2-8-5
c) 2-5-1
d) 2-6

Which element is a liquid at 1000. K?
a) Ag
b) Al
c) Ca
d) Ni

Which formula represents ammonium nitrate?
a) NH4NO3
b) NH4NO2
c) NH4(NO3)2
d) NH4(NO2)2

The empirical formula for butene is
a) CH2
b) C2H4
c) C4H6
d) C4H8

Which equation represents a conservation of charge?
a) 2Fe^3+ + Al → 2Fe^2+ + Al^3+
b) 2Fe^3+ + 2Al → 3Fe^2+ + 2Al^3+
c) 3Fe^3+ + 2Al → 2Fe^2+ + 2Al^3+
d) 3Fe^3+ + Al → 3Fe^2+ + Al^3+

Which type of reaction is represented by this equation?
a) decomposition
b) double replacement
c) single replacement
d) synthesis

When a Mg^2+ ion becomes a Mg atom, the radius increases because the Mg^2+ ion
a) gains 2 protons
b) gains 2 electrons
c) loses 2 protons
d) loses 2 electrons

The least polar bond is found in a molecule of
a) HI
b) HF
c) HCl
d) HBr

A solution is prepared using 0.125 g of glucose, C6H12O6, in enough water to make 250. g of total solution. The concentration of this solution, expressed in parts per million, is
a) 5.00 × 10^1 ppm
b) 5.00 × 10^2 ppm
c) 5.00 × 10^3 ppm
d) 5.00 × 10^4 ppm

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