Name ______________________                             What’s Cookin

Bonus #3    10/10/05                                                      Due   10/24/05 at start of class                  

 

1.  How many moles of C are in 6.0 grams of C?

 

 

 

 

2.  What does 1.5 moles of He weigh in grams?  What does 100 moles helium weigh?

 

 

 

 

3.  Calculate the number of moles in 180 grams of: 

                                a)  H2                                                           b)  glucose  

 

 

 

 

 

4.  How many moles of gold are in one liter of gold?

 

 

 

 

 

 

 

5.  How many moles of Al2(SO4)3 are in one mole of Al2(SO4)3?  How many moles of sulfate and how many moles of the aluminum ion?

 

 

 

 

 

 

6.  How many grams of oxygen are 1 mole of C6H12O6?

 

 

 

 

 

 

 

 

7.  Calculate the number of moles in 412 grams of each compound shown below.  Which has more moles of potassium?

 

                          a)  K2(CO3)                                                   b)  KCl

 

 

 

8.  Consider one liter of water.  How many moles of water is this?

 

 

 

 

 

 

 

 

 

 

9.  Based on most salt labels, 6.00 grams of their product will supply all the needed sodium that you need for an entire day.  How many moles of sodium chloride is 6 grams?  If per chance that potassium chloride, on a molecular basis, is as salty as sodium chloride how many grams of potassium chloride would be needed to “equal” the 6.00 grams of NaCl?

 

 

 

 

 

 

 

10.  Methanol can kill you if you consume it.  My Merck Index stated that 100 to 250 mL is enough to kill, though as low as 30 mL is sufficient.  Let us say that 125 mL is the volume needed to kill 50 % of the humans that consume it.  Determine the LD-50 value, based on this number, a 165 pound human and the density of methanol being 0.80 grams/mL.  Your answer should have units of g methanol/kg body weight.

 

 

 

 

 

 

11. Often one way you get probed in life is via multiple guess questions.  I do not believe they always reflect a person’s knowledge, however here are some to practice.

 

a.  Determine the number of moles of aluminum in 96.7 g of Al.

 

            a)  0.279 mol                                        b)  3.58 mol                                        c)  7.43 mol

            d)  4.21 mol                                         e)  6.02 x 1023 mol                              f) none of the others

 

 

 

 

b.  Calculate the number of moles of P in 12.0 g of Phosphorus.

 

            a)  0.387 mol                                        b)  0.80 mol                             c)  2.58 mol

            d)  12.0 mol                                         e)  6.02 x 1023 mol                  f) none of the others

 

 

 

 

c.  The formula for calcium phosphate is:

 

            a)  CaPO4                                            b)  Ca3(PO4)2                            c)  Ca2(PO4)3

            d)  Ca3P2                                              e)  Ca3(PO3)2                                     f) none of the others