Balancing Chemical Equations

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What is the oxidation state of aluminum in the compound Al(NO3)3?

+3 (correct)

+2

+5

+1

What type of reaction is the process: Mg + H2O —> Mg(OH)2 + H2 + 430 kJ?

neutral

exothermic (correct)

catalytic

endothermic

What is the role of zinc in the reaction: Zn(s) + HCl(aq) —> ZnCl2(aq) + H2(g)?

oxidizing agent

inert substance

reducing agent (correct)

catalyst

What is the oxidation number of bromine in the compound KBrO4?

+7 Signup and view all the answers

How many moles of CO2 are produced in the reaction: C5H12O(g) + 8O2(g) → 5CO2(g) + 6H2O(g) if 2 moles of C5H12O react?

5 moles Signup and view all the answers

What is the correct balancing of the equation: NH4OH(aq) + Al(NO3)3(aq) → Al(OH)3(s) + NH4NO3(aq)?

2NH4OH(aq) + Al(NO3)3(aq) → Al(OH)3(s) + 2NH4NO3(aq) Signup and view all the answers

What is the oxidation state of Ag in the reactant side of the equation Al(NO3)3 (aq) + 3 Ag (s) → Al (s) + 3 AgNO3 (aq)?

0 Signup and view all the answers

According to the activity series, which reaction will not occur as written?

Cu + MgCl2 → Mg + CuCl2 Signup and view all the answers

What is the unit of energy of activation?

Kilojoules Signup and view all the answers

What is the molarity of 5.25 mL of a solution containing 0.00250 mole of CaCl2?

0.476 M Signup and view all the answers

What is the number of moles of CaCl2 in 15.00 mL of 0.123 M CaCl2 solution?

0.00185 mol Signup and view all the answers

What happens to the rate of reaction when the concentration of C is doubled, given the rate law rate = k [C]?

The rate doubles Signup and view all the answers

What is the correct equilibrium constant expression (Keq) for the reaction 2NO2 (g) 2NO (g) + O2 (g)?

Keq = [NO]^2 [O2] / [NO2]^2 Signup and view all the answers

What is the concentration of Ba(OH)2 in the reaction 2 HBr + Ba(OH)2 → BaBr2 + 2 H2O?

0.350 M Signup and view all the answers

What is the ΔE for the reaction in the energy profile diagram?

72.3 kJ Signup and view all the answers

Which of the following reactions goes essentially to completion, based on the Keq value?

2 H2 (g) + O2 (g) 2 H2O (g) Keq = 3.0 x 10^81 Signup and view all the answers

What is the effect of increasing the concentration of SO2 on the equilibrium 2SO2 (g) + O2 (g) 2SO3 (g) + heat?

The reaction shifts to the right Signup and view all the answers

What is the effect of adding a catalyst to the equilibrium reaction 2SO2 (g) + O2 (g) 2SO3 (g) + heat?

The reaction rate increases, but the equilibrium constant remains unchanged Signup and view all the answers