Reviewing Chemistry Concepts 2

1. Reviewing Chemistry Concepts 2 9 weeks exam review

2. Question 1 • What units are used to describe the solubility of a substance in a given solution? • A amount of solute per amount of solvent • B grams of solvent • C grams of solute • D grams of solvent per gram of solute

3. Question 2 • A sample of Element X is found tocontain72.15% of isotope type 1 (84.9118 amu) and 27.85% of isotope type 2 (86.9092 amu). Calculate the average atomic mass. • F 85.13 amu • G 85.47 amu • H 86.21 amu • J 86.49 amu

4. Question 3 • The properties of elements, according to periodic law, can be predicted by — • F the number of isotopes • G the solubility of the element • H the position on the periodic table • J the color of the element

5. Question 4 • Based on information from the periodic table, which two elements will bond in ratio similar to that of lithium oxide? (2:1) • A magnesium and sulfur • B sodium and fluorine • C hydrogen and sulfur • D magnesium and oxygen

6. Question 5 • Any substance that does NOT conduct electricity when in solution is called a(n) ? • A nonelectrolyte • B electrolyte • C conductor • D semiconductor

7. Question 6 • F blue • G green • H yellow • J red

8. Question 7 • Which of the following atoms would have the largest ionic radius? • A lithium • B sodium • C potassium • D cesium

9. Question 8 • Which of the following is the best way to determine if an aqueous solution of sodium acetate (NaC2H3O2) is supersaturated? • A Add water to the solution. • B Measure the temperature of the NaC2H3O2. • C Filter all the NaC2H3O2 out of the solution. • D Add a crystal of NaC2H3O2to the solution.

10. Question 9 • How many grams of iron (III) chloride, FeCl3, should be added to a 100.0mL volumetric flask in order to prepare 0.050 M FeCl3? (Answer with significant digits.)

11. Question 10 • "An electron must occupy the lowest available energy orbital" is stated by — • F the Aufbau Principle • G Hund's Rule • H the Pauli Exclusion Principle • J Bohr's Law