Name ______________________                             What’s Cookin

Bonus #1    09/26/05                                                      Due   10/03/05 at start of class  

 

1.  Given the following information about three compounds, answer the questions below. 

 

 

 

   Compound   color   odor   Bp   Mp

 

   chlorine (Cl2)   yellow/green   irritating   -34.6˚ C   -101˚ C

   ethyl alcohol   clear   pleasing   78.5˚ C   -117˚ C

   sodium chloride   white   none   1473˚ C   801˚ C

 

a.  What compound(s) is a solid at room temperature (25˚ C)?

 

 

b.  What compound(s) is a gas at 25˚ C?

 

 

c.     If eqaul amounts of each substance were placed in a dish and left exposed to the air, which would remain the longest.  Explain

 

 

 

2.  Which volume is greater  2 X 104 milliliters or 2.5 gallons?

 

 

3.  A carbon-carbon bond is about 141 pm in length.  How many grams is this?

 

 

4.  Which volume is greater  3 m3 or 500 gallons?

 

 

 

5.  How many teaspoons and are in a liter?

 

 

6.  If you had a pound of vitamin C and you wanted to create 200 mg vitamin C tablets how many could you make?

 

 

7.  Note page ten in PIN.  How many grams of ethanol would it take to satisfy the energy requirements if one needed 2000 Calories a day?  If a bottel of beer contained 15 grams ethanol, how many beers would this be?

 

 

8.  If an unknown element had a volume of 20.0 mL and a mass of 178 grams, what is its density?  Can you identify the element, if so what is it, if not why not.

9.  Answer these multiple guess questions.

 

a.  An irregularly shaped piece of metal with a mass of 125.0 g is placed into a graduated cylinder that contains 25.00 mL of water.  This raises the water level to 56.00 mL.  What is the density of the metal?

 

          a)  5.00 g/cm3          b)  4.03 g/cm3          c)  2.23 g/cm3

          d)  1.51 g/cm3          e)  0.25 g/cm3                        f) none of the others

 

b.  Ask an average Englishwoman what her weight is and she may say "ten and a half stones".  A stone is 14 pounds.  How many pounds is this?

          a.  140     b.  133     c.  70

                 d.  145           e.  147           f.  none of these

 

c.  Express 7500 mg as mg.

          a)  750 mg          b)  75.0 mg          c)  7.50 mg

          d)  7.5 x 106 mg          e)  7.5 x 1012 mg

 

d.  The average distance from the Earth to the Sun is 9.3 x 107 miles.  How many kilometers is this?

          a)  1.7 x 10-8 km          b)  1.5 x 105 km          c)  5.6 x 107 km

          d)  1.5 x 108 km                    e)  1.5 x 1011 km               f) none of the others

 

e.  A US barrel is 4.21 cubic feet.  Express this in liters.

          a)  3.99 x 10-5 L          b)  1.00 x 10-2 L          c)  19.9 L

          d)  105 L e)  119 L f) none of the others

 

 

10.  Record the following measurements using the correct number of significant figures.