Supplemental Instruction
Iowa State University / Leader: / Sara
Course: / Chem 177
Instructor: / Kingston
Date:
1. What is the correct formula for iron (III) Phosphate?
a. Fe2(PO4)3
b. Fe3(PO4)3
c. FePO4
d. Fe3(PO4)2
2. hydrofluoric acid is a clear liquid that had a density of 5.3 g/mL. At room temperature it reacts with silicon dioxide which has a melting point of 1600 degrees Celsius. In the reaction liquid water and silicon tetrafluoride (with a boiling point of -86 degree Celsius) is produced.
a. Write a balanced chemical equation for this reaction and be sure to include states.
b. List 1 chemical, 1 intensive, and 1 physical property from the above description.
c. If 3.23 grams hydrofluoric acid with excess Silicon dioxide undergo the reaction from above. How many molecules of Silicon tetrafluoride are produced.
3. In the combustion of C2H4 what coefficient would be placed in front of H2O ?
a. 1
b. 1/2
c. 3
d. 5/2
e. 5
4. Solve the equation with the correct amount of significant figures: (10.5734 x 11.527) + 1.3
a. 100
b. 120
c. 123.179
d. 123.18
e. 123.2
5. What is the mass of a single molecule of calcium carbonate?
a. 102 Amu
b. 102 g
c. 162 Amu
d. 162 g
6. Air is composed mostly of Nitrogen and Oxygen. Nitrogen in its elemental form is diatomic (N2). N2 is a ______
a. Pure substance
b. Homogeneous mixture
c. Heterogeneous mixture
d. Compound
7. What is the charge of a proton, neutron and electron respectively?
a. +,-,0
b. -,+,0
c. 0,+,-
d. 0,-,+
e. +,0,-
Use the periodic Table to answer the next 3 questions:
8. What letter element is a noble gas?
9. What letter element is an alkali metal?
10. What letter element could have multiple charges
11. The density of a wood block is0.67g/mL. The block is 5.4 in * 3.3 in * 6.1 in. How much will the block weigh in kg?
12. What would be the best choice for the volume of the graduated cylinder?
a. 3
b. 3.0
c. 3.5
d. 3.75
e. 4.0
13. If you have 24 g of Al2O3, how many atoms of Aluminum do you have?
14. Fill in the blanks in the table:
Compound name / Compound formula / Ionic, covalent, ion, organic or acid?FeCl2
Sulfur Tetrabromide
ClO3-
Sodium Nitrate
Hypoiodous acid
N3Cl
C4H10