August 2024 Chemistry Regents Questions 41-50 Question Preview (ID: 63418)

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Which phase change results in an increase in disorder?

a) I2(g) → I2(s)

b) Cl2(l) → Cl2(g)

c) N2O4(g) → N2O4(l)

d) H2O(l) → H2O(s)

Which formula represents an unsaturated hydrocarbon?

a) 1

b) 2

c) 3

d) 4

Which formula represents the missing reactant, X, in this equation?

a) C5H6O5

b) C5H12O5

c) C6H6O6

d) C6H12O6

Which equation represents a combustion reaction?

a) Cl2 + 2NaBr → 2NaCl + Br2

b) 2CH3OH + 3O2 → 2CO2 + 4H2O

c) 2K + 2H2O → 2KOH + H2

d) BaS + 2H2O → Ba(OH)2 + H2S

What is the number of moles of electrons gained by Cl2(g) when 2.0 moles of electrons are lost by I-(aq)?

a) 1.0 mol

b) 2.0 mol

c) 3.0 mol

d) 4.0 mol

Which statement describes a 0.1 M NaOH(aq) solution?

a) The solution contains an Arrhenius acid and conducts electricity.

b) The solution contains an Arrhenius acid and does not conduct electricity.

c) The solution contains an Arrhenius base and conducts electricity.

d) The solution contains an Arrhenius base and does not conduct electricity.

A sample of LiOH(aq) has a concentration of 0.020 M. How many significant figures are used to express the concentration of this solution?

a) 1

b) 2

c) 3

d) 4

The mole ratio of oxygen molecules to carbon dioxide molecules is

a) 1:2

b) 1:3

c) 3:2

d) 3:3

Which statement describes the reaction that occurs inside the beaker?

a) A spontaneous reaction converts electrical energy to chemical energy.

b) A spontaneous reaction converts chemical energy to electrical energy.

c) A nonspontaneous reaction uses electrical energy to produce a chemical change.

d) A nonspontaneous reaction uses chemical change to produce electrical energy.

Which two formulas represent the H1 acceptors in this equilibrium?

a) 1

b) 2

c) 3

d) 4

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