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Which of the following factors will increase the rate of a reaction?

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1. Which of the following factors will increase the rate of a reaction? (Points: 5);Adding more reactants;Increasing the temperature of the reaction;Adding a catalyst;Neither A, B, nor C;A, B, or C;Question 2. Which should be the coefficient of hydrogen, H2, in the following equation in order to make it balanced?;2 Al + 3 H2SO4 ---> Al2(SO4)3 +? H2 (Points: 5);5;1;4;2;3;Question 3. Magnesium reacts with oxygen to form magnesium oxide and has the following balanced chemical equation: 2 Mg + O2 --> 2 MgO.;How many mole(s) of oxygen gas (O2) are needed to react with 4.0 moles of Mg? (Points: 5);2.0 moles;3.0 moles;6.0 moles;1.0 mole;4.0 moles;Question 4. (2 answers) (a)Determine the number of atoms for each element present in the following molecule: Cu(NO2)2 (3 points).;(b) Using the periodic table of elements, determine the molar mass for this molecule (7 points). (Points: 10);Question 5. (2 answers) You are asked to calculate the concentration of a KCl (in water) solution in several ways and are given the following information: 3.5 g KCl, 50 mL solution, 50 g water, 1 mole KCl = 74.6 g KCl.;(a) Calculate the mass/mass percent concentration (4 points).;(b) Calculate the molarity of the solution (6 points). (Points: 10);Question 6. What volume (L) of a 3M KOH solution can be prepared by diluting 0.5 L of a 5M KOH solution? (Points: 5)

 

Paper#16440 | Written in 18-Jul-2015

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