Experiment 3 Pre-Laboratory Questions 3. A compound is analyzed, and is fou to c

Question

Experiment 3 Pre-Laboratory Questions 3. A compound is analyzed, and is fou to contain 74 containing only carbon and hydrogen of the compound may be calcu carbon on a ass basis. Sho e empirical for 4. If 1.000 g of elemental carbon is heated in a stream of hydrogen gas, l.335 g of a compound containing only carbon and hydrogen is produced. Show how the empirical formula of the compound may be calculated. accessible o 2012 Cengage Learnung All Rights Reserved May not be scanned, Lab Instr EXPERIM Perce Empi Result eight eight Weigh Weigh Weig Weig We Mea Per

Explanation / Answer

3)CH4

74.88 =C

25.12 =H

74.88/12      :   25.12/1 WEIGHT IS DEVIDED BY MW

6.24            :25.12

6.24/2.24     :25.12/6.24 DEVIDE WITH SMALL FRACTION

1                  4

CH4

4) C+ 2H2 ........>CH4

16gr of compound contain 12gr C

1.335 gr contain     ?

1.335/16 *12

=1gr

16 gr compound contain 4 gr

1.335 hydrogen     ?

1.335/16 *4 =0.33 gr

calculation of emperical formula

1/12=c

0.33/1=H

0.08=c

0.33=H

devide with small fractin

0.08/0.08     0.33/0.08

C H4

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