Quizz 2 Post

1.      We have 3mol N₂ gas and 10mol H₂ gas, how many moles of ammonia can be formed?

N₂ + 3H₂ -> 2NH₃

• 3

• 4

• 6

• 5

1.      If water is added to 175 mL of a 0.45 M KOH solution until the volume is 250 mL, what will the molarity of the diluted solution be?

• .315

• .415

• .234

• .45

What is the limiting reactant if you have 48g of oxygen gas and 16g H₂?   2H₂ + O₂  ->  2 H₂O  

• Oxygen

• Hydrogen

If 5 mol of both hydrochloric acid and sodium sulfide are reacted, how many moles of H₂S are produced?

2HCl + Na₂S -> H₂S + 2NaCl

• 1 mol

• 1.25 mol

• 2.5 mol

• 5 mol

What volume of 10 M H₂SO₄ is required to prepare 4.0 L of .50 M H₂SO₄?

• .4 L

• .2 L

• .6 L

• .8 L

What is charge of NH₄

• +2

• -1

• -2

• +1

Which of the following pairs identifies the reducing agent and oxidizing agents, respectively?

C₆H₈O₆ + 2H⁺ + 2NO₂^- -> C₆H₆O₆ + 2H₂O + 2NO

• C₆H₈O₆ and NO₂^-

• NO₂^- and C₆H₈O₆

• H⁺ and 2NO₂^-

• C₆H₈O₆ and H⁺

What is the oxidation half-reaction in the following reaction?

Mg(s) + 2Ag⁺(aq) -> Mg²⁺(aq) + 2Ag(s)

• Mg(s) -> Mg²⁺(aq) + 2e^-

• Mg(s) + 2e^- -> Mg²⁺(aq)

• Ag⁺(aq) -> Ag(s) + e^-

• Ag⁺(aq) + e^- -> Ag(s)

What is the coefficient of hydrogen gas after balancing the following equation? _Pb(s) + _HNO₃(aq) → _Pb(NO₃)₄(aq) + _H₂(g)

• 4

• 2

• 1

• 3

Assign the proper oxidation state for the sulfur atom in the molecule H₂S

• +2

• +1

• -1

• -2