Conversions and Dosage

Please see the attached file for the complete problems.


Significant Figures in Calculations

Part A
Compute  . Round the answer appropriately.
Express your answer numerically using the proper number of significant figures.
  


Part B
Compute  . Round the answer appropriately.
Express your answer numerically using the proper number of significant figures.
  

Part C
Compute  . Round the answer appropriately.
Express your answer numerically using the proper number of significant figures.
  


Scientific Notation

Part A
Type the number 1340000 in scientific notation.
Express your answer using scientific notation.

1340000 =

Part B
Type the number 0.000354 in scientific notation.
Express your answer using scientific notation.

0.000354 =

















Part D
Type the number  in standard notation.
Express your answer using standard notation.

=


Part E
Write the number  in standard notation.
Express your answer using standard notation.
   =





Using Percentage as a Conversion Factor

Part A

A solution of cough syrup contains 5.00  active ingredient by volume. If the total volume of the bottle is 66.0  , how many milliliters of active ingredient are in the bottle?
Express your answer numerically in milliliters.

=  


Part B
Sylvanite is a mineral that contains 28.0  gold by mass. How much sylvanite would you need to dig up to obtain 32.0   of gold?
Express your answer numerically in grams.

=  

Part C
If an athlete weighs 151   and has 15.0  body fat by weight, how many pounds of fat does the athlete's body contain?
Express your answer numerically in pounds.

=  

Counting Significant Figures

Number Significant figures Explanation
23.56 4 All nonzero digits are significant.
23.560 5 Trailing zeros are significant when a decimal point is shown.
1000 1 Trailing zeros are not considered significant when no decimal point is shown.
1000. 4 Showing the decimal point indicates that the preceding zeros are significant.
500.01 5 Zeros between nonzero digits are significant.
0.0078 2 Leading zeros are not significant.

Part A
Determine the number of significant figures in the measurement 6.07  ?
Express your answer numerically as an integer.



Part B
Determine the number of significant figures in the measurement 0.0030  ?
Express your answer numerically as an integer.


Part C
Round the value 44.981  to three significant figures.
Express your answer numerically using three significant figures.
  


Determining the Correct Dosage

Part B
Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. A bottle contains 275   of insulin at a concentration of 40.0  . What is the total mass of insulin in the bottle?
Express your answer numerically in milligrams.

     =    

Part C
If you are administering an insulin dose of 70.0   from a bottle at a concentration of 10.0  , how many milliliters of the solution do you need to give the patient?
Express your answer numerically in milliliters.

     =     ml

Attached file(s):

CHP1 chem.doc  View File