CHM 2045C Module Two Sample Exam

 

Module Two-Part F: Unit Analysis Problems        10 points

Apply the unit analysis method of problem solving to each of the following (setup statement 1 pt, unit analysis setup 3 pts, answer 1 pt with its proper unit)( If greater than three significant figures round off to three significant figures):

 

(1) How many karats is a diamond weighing 234.2 mg?  (One karat = 0.200 g)

 

 

 

 

 

 

 

 

 

(2) Insurance statistics state that a person loses 8 minutes of average life for each cigarette smoked.  If there are 20 cigarettes in a pack and the average cost of cigarette is $4.50 per pack over the next 15 years, how many years of average life would a person lose for smoking 1.5 packs a day for 15 years?

 

 

 

 

 

 

 

Module Two-Part H: Density, Specific Gravity & Volume Problems        08 points

 

1. A quartz rock was cut into a rectangular solid paperweight.  IF the paperweight has a mass of 165 g and measures 5.00 cm by 5.00 cm by 25.0 mm, what is its volume in cubic centimeters?

 

 

 

 

 

 

 

 

 

 

 

2.  Calculate the density in g/mL for   10.0 grams of ethyl ether having a volume 14.0 mL.