June 2018 Chemistry Regents Questions 41-50 Question Preview (ID: 59754)

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An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity?

a) carbon

b) fluorine

c) nitrogen

d) oxygen

What is the concentration of an aqueous solution that contains 1.5 moles of NaCl in 500. milliliters of this solution?

a) 0.30 M

b) 0.75 M

c) 3.0 M

d) 7.5 M

Which two gas samples contain the same number of molecules?

a) I and II

b) I and III

c) II and III

d) II and IV

Based on Table I, what is the /\H value for the production of 1.00 mole of NO2(g) from its elements at 101.3 kPa and 298 K?

a) +33.2 kJ

b) -33.2 kJ

c) +132.8 kJ

d) -132.8 kJ

Which equation represents an addition reaction?

a) C3H8 + Cl2 → C3H7Cl + HCl

b) C3H6 + Cl2 → C3H6Cl2

c) CaCl2 + Na2CO3 → CaCO3 + 2NaCl

d) CaCO3 → CaO + CO2

In this reaction, each Ni atom

a) loses 1 electron

b) loses 2 electrons

c) gains 1 electrons

d) gains 2 electrons

Which equation represents a reduction half-reaction?

a) Fe → Fe^3+ + 3e–

b) Fe +3e– → Fe^3+

c) Fe^3+ → Fe + 3e–

d) Fe^3+ + 3e– → Fe

During this reaction, electrons are transferred from

a) Cu(s) to Ag+(aq)

b) Cu^2+(aq) to Ag(s)

c) Ag(s) to Cu^2+(aq)

d) Ag+(aq) to Cu(s)

Which metal reacts spontaneously with Sr^2+ ions?

a) Ca(s)

b) Co(s)

c) Cs(s)

d) Cu(s)

The water molecule acts as a base because it

a) donates an H+

b) accepts an H+

c) donates an OH-

d) accepts an OH-

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