Chemistry Questions - English Form

	Chem: Question G3.5
	Balance the following equation: SO₂(g) + O₂(g) -> SO₃(g)

Issue: two parts of the original question were commented out. 1. determining the state of a product, which is not covered in the syllabus. 2. reaction involving benzene, which is an organic substance and is out of scope.

	Chem: Question G3.9
	When the metallic element sodium combines with the nonmetallic element bromine, Br₂(l), how can you determine the chemical formula of the product? Write the balanced chemical equation for the reaction.

	Chem: Question G3.10
	(a) Determine the chemical formula of the product formed when the metallic element calcium combines with the nonmetallic element oxygen, O₂. Write the balanced equation for the reaction. (b) What products form when a compound containing C, H, and O is completely combusted in air? White a balanced chemical equation for the combustion of acetone, C₃H₁₂O(l), in air.

	Chem: Question G3.11
	Write a balanced equation for the reaction that occurs when a) Mg(s) reacts with Cl₂(g) b) nickel(II) hydroxide decomposes into nickel(II) oxide and water when heated c) the hydrocarbon styrene, C8H8(l), is combusted in air d) the gasoline additive MTBE (methyl tertuary-bytyl ether), C5H12O(l), burns in air

	Chem: Question G3.12
	Write a balanced equation for the reaction that occurs when a) aluminum metal undergoes a combination reaction with BR2 b) strontium carbonate decomposes into strontium oxide and carbon dioxide when heated c) heptane, C7H16, burns in air d) dimethylether, CH3OCH3, is combusted in air

	Chem: Question G3.13
	Balance the equations and indicate whether they are combination, decomposition, or combustion reactions: a) Al + Cl2 --> AlCl3 b) C2H4 + O2 --> CO2 H2O c) Li + N2 --> Li3N d) PbCO3 --> PbO + CO2 e) C7H8O2 + O2 --> CO2 + H2O

	Chem: Question G3.14
	Balance the equations and indicate whether they are combination, decomposition, or combustion reactions: a) C3H6 + O2 --> CO2 + H2O b) NH4NO3 --> N2O + H2O c) C5H6O + O2 --> N2O + H2O d) N2 + H2 --> NH3 e) K2O + H2O --> KOH

Chem: Question G4.10

Acetone, CH₃COCH₃, is a nonelectrolyte; hypochlorous acid, HClO, is a weak electrolyte; and ammonium chloride, NH₄Cl, is a strong electrolyte. (a) What are the solute particles present in aqueous solutions of each compound? (b) If 0.1 mol of each compound is dissolved in solution, which one contains 0.2 mol of solute particles, which contains 0.1 mol of solute particles, and which contains somewhere between 0.1 and 0.2 mol of solute particles?

	Chem: Question G4.11
	Using solubility guidelines, predict whether each of the following compounds is soluble or insoluble in water: (a) NiCl₂ (b)Ag₂S (c) Cs₃PO₄ (d) SrCO₃ (e) (NH₄)₂SO₄

	Chem: Question G4.11
	What is the difference between: (a) a monoprotic acid and a diprotic acid; (b) a weak acid and a strong acid; (c) an acid and a base?

	Chem: Question AP99-38
	A molecule or an ion is classified as a Lewis acid if it (a) accepts a proton from water (b) accepts a pair of electrons to form a bond (c) donates a pair of electrons to form a bond (d) donates a proton to water (e) has resonance Lewis electron-dot structures

Chem: Question AP99-43

A sample of 61.8 g of H3BO3, a weak acid is dissolved in 1,000 g of water to make a 1.0-molar solution. Which of the following would be the best procedure to determine to molarity of the solution? (Assume no additional information is available.)

(A) Titration of the solution with standard acid
(B) Measurement of the pH with a pH meter
(C) Determination of the boiling point of the solution
(D) Measurement of the total volume of the solution
(E) Measurement of the specific heat of the solution