CHEM 1100 Summer 2014 Dr. Stone Quiz 2 Name___

Show all of your work. All answers must be in scientific notation with the correct number of significant figures and the correct units. This is a 15 minute quiz. Show all of your work. Each question is worth 2 points.

Kinetic Energy, K.E. = ½mv^{2}

J = kgm^{2}/sec^{2}

28.350 g = ounce

2.54 cm = inch

6.2 x 10^{-1}miles = 1 km

1. Dr. Stone wants new tile in her kitchen! The tile comes in squares that are 2.0 x 10.1 cm on each side. How many squares should she buy to cover a 5.0 ft by 12 ft kitchen floor?

2. Some reactions occur very fast, if a reaction takes 2.8 x 10^{2} ns, how many seconds is this?

3. A lithium atom is approximately 2.87 x 10^{2} pm in diameter, how many lithium atoms are needed to form a line that is 3.2 cm long?

4. Convert 4.5 x 10^{9} pm^{3} to m^{3}

5. Give the name and symbol for a noble gas.

6. Give the name and symbol for a halogen.

7. Give the name and symbol for a metalloid

8. What group of elements contains all diatomic molecules at STP (Standard Temperature and Pressure)?

9. Ian Kennedy set off a huge donnybrook by throwing a fastball that hit Zack Greinke in the head. What is the kinetic energy of a 5.2 ounce baseball traveling at 95 miles per hour?

10. What group of metals reacts violently with water?