ABEKA CHEMISTRY PRECISION & DESIGN GRADE 11 - TEST 2 WITH COMPLETE VERIFIED SOLUITONS

What is the value of Avogadro's number? a. 1.602 x 10⁻²³ b. 6.022 x 10⁻²³ c. 1.602 x 10²³ d. 6.022 x 10²³ d. 6.022 x 10²³ A molecule of sugar fructose contains 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. What is it empirical formula? a. CHO b. CHO₂₄ c. CH₂O d. C₆H₁₂O₆ c. CH₂O Things to Look Out for When Buying a Used Caravan Which of the following mole ratios cannot be derived from the equation 2 C₇H₈(g)→7 CO₂(g) + 4 H₂O(g)? a. 4 mol C₇H₈ : 2 mol H₂O b. 9 mol O₂ : 7 mol CO₂ c. 2 mol C₇H₈ : 9 mol O₂ d. 2 mol C₇H₈ : 7 mol CO₂ a. 4 mol C₇H₈ : 2 mol H₂O If the empirical formula of a substance is known, what additional information is needed to calculate the molecular formula? a. molar mass b. limiting amount c. stoichiometric coefficient d. displacement factor a. molar mass What is the formula of nitrogen dioxide? a. NO b. NO₂ c. N₂O d. N₂O₂ b. NO₂ What is the formula of copper(I) hydroxide? a. CuOH b. Cu(OH)₂ c. Cu₂OH d. Cu₂(OH)₃ a. CuOH What is the formula of calcium carbonate? a. CaCO₃ b. Ca(CO₃)₂ c. Ca₂CO₃ d. Ca₃CO₃ a. CaCO₃ Name this formula: NO₃⁻ E. nitrate ion Name this formula: NH₄⁺ A. ammonium ion SO₄²⁻ G. sulfate ion Fe²⁺ C. iron (II) ion Name the correct charge for this ion: phosphate ion G. 3- Name the correct charge for this ion: chloride ion E. 1- Name the correct charge for this ion: lead (II) ion B. 2+ Name the correct charge for this ion: hydrogen ion C. 1+ Name the compound: (NH₄)₂SO₄ ammonium sulfate Name the compound: SF₆ sulfur hexafluoride Name the compound: NaOH sodium hydroxide Name the compound: CO₂ carbon dioxide Name the compound: Fe(NO₃)₂ iron (II) nitrate Correct category for each reaction (answer may be used more than once): 2 Ag₂O(s) →∆→4 AG(s) + O₂(g) B. decomposition reaction Correct category for each reaction (answer may be used more than once): BaCl₂(aq) + K₂CrO₄(aq) → 2 BaCrO₄(aq) + 2 KCl(s) C. double-displacement reaction Correct category for each reaction (answer may be used more than once): Ag(s) + NaCl(aq) →AgCl(s) + Na(s) D. single-displacement reaction Correct category for each reaction (answer may be used more than once): NH₃(g) + HCl(g)→NH₄Cl(s) A. combination reaction Correct category for each reaction (answer may be used more than once): H₂O(g)→2 H₂(g) + O₂(g) B. decomposition reaction What unit is equivalent to Avogadro's number of objects? mole What is a set of symbols that tells how many of each type of atom are found in a molecule? molecular formula What is the sum of the atomic masses of all the atoms in a molecule? molecular mass N₂H₄ (hydrazine) is sometimes used as a rocket fuel because it reacts readily with oxygen-containing compounds to produce large amounts of hot gas; one such reaction is 2 N₂H₄(l) + N₂O₄(l)→3 N₂(g) + 4 H₂O(g). If 3 mol N₂H₄ and 4 mol N₂O₄ are available at the beginning of this reaction, which substance will be the limiting reactant? N₂H₄ (hydrazine) Balance the equation: Ca(s) + H₂O(l) → Ca(OH)₂(aq) + H₂(g) Ca(s) + H₂O(l) → Ca(OH)₂(aq) + H₂(g) Balance the equation: KClO₃(s) → KCl(s) + O₂(g) 2 KClO₃(s) → 2 KCl(s) + 3 O₂(g) Balance the equation: Sb₂S₃(s) + O₂(g) → Sb₂O₃ + SO₂(g) 2 Sb₂S₃(s) + 9 O₂(g) →2 Sb₂O₃(s) + 6 SO₂(g) Show your work; express the answer using proper significant figures and units: Find the molecular mass of NO₂. Show your work; express the answer using proper significant figures and units: Find the molar mass of AgNO₃.