B. Accutane is found to contain 79.95% C and 9.40% H with the remainder being oxygen. Its molar mass is found to be 300 g/mol. What are the empirical and molecular formulas for Accutane? Empirical formula: Molecular formula:

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B. Accutane is found to contain 79.95% C and 9.40% H
with the remainder being oxygen. Its molar mass is found
to be 300 g/mol. What are the empirical and molecular
formulas for Accutane?
Empirical formula:
Molecular formula:
C. When 10.0 g of an unknown organic acid composed of
C, H, and O is subjected to combustion analysis, 21.2
grams of CO2and 3.25 grams of H20 are produced. The
molar mass of the acid is 165. What are the empirical
formula and the molecular formula of the acid?
Empirical formula:
Molecular formula:
Transcribed Image Text:B. Accutane is found to contain 79.95% C and 9.40% H with the remainder being oxygen. Its molar mass is found to be 300 g/mol. What are the empirical and molecular formulas for Accutane? Empirical formula: Molecular formula: C. When 10.0 g of an unknown organic acid composed of C, H, and O is subjected to combustion analysis, 21.2 grams of CO2and 3.25 grams of H20 are produced. The molar mass of the acid is 165. What are the empirical formula and the molecular formula of the acid? Empirical formula: Molecular formula:
A. A compound has the following elemental analysis:
Elements
% composition
C
40.00
H
6.69
53.31
Its molar mass is around 120g/mol. What is its empirical formula and molecular
formula?
The subscript function does not work. For example, if your answer is C12H2206 submit as
C12H2206.
Empirical formula:
Molecular formula:
Transcribed Image Text:A. A compound has the following elemental analysis: Elements % composition C 40.00 H 6.69 53.31 Its molar mass is around 120g/mol. What is its empirical formula and molecular formula? The subscript function does not work. For example, if your answer is C12H2206 submit as C12H2206. Empirical formula: Molecular formula:
Expert Solution
Step 1

elements    percentage    atomic mass    moles=%/at. mass    simplest molar ratio       

C                79.95              12                     6.66                          6.66/0.66=10.0              

H                9.40                 1                      9.4                           9.4/0.66=14.2               

O                10.65               16                     0.66                        0.66/0.66=1                 

Empirical formula for this compound = C10H14O

empirical formula mass= 10×12+14×1+16=150

 

 

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