C=82.76% H=17.24% Molecular formula ???

ok

Explanation:

Element  %composition  Mol. mass  No. of C atoms  Simplest       Rounding

                                                                                           ratio             off  

C                     82.76                   12            6.89             1× 2                 2              

H                    17.24                      1              17.24              2.5× 2           5

Number of carbon atoms present =  

12

82.76

 

=6.89

Number of hydrogen atoms present =  

1

17.24

 

=17.24

simplest ratio =  

6.89

6.89

 

=1  

simplest ratio =  

6.89

17.24

 

=2.5

∴ Empirical fromula is C  

2

 

H  

5

 

 

Empirical formula mass= 2×12+5 = 29

∴ V.D. = 29

Mol. mass = 2 × V.D.

=58

n=  

Empiricalformulamass

Molecularmass

 

 

=  

29

58

 

=2

∴ Molecular formula = C  

4

 

H  

10

pls mark me as braillant

Charles law gives the relationship between volume and temperature of gas at constant pressure 
it states that at constant pressure, volume of gas is directly proportional to temperature 
V/T = k
where V - volume T - temperature and k - constant 

parameters for the first instance are on the left side of the equation and parameters for the second instance are on the right side of the equation
T1 - temperature in Kelvin - 27 °C + 273 = 300 K
T2 - 11 °C + 273 = 284 K
substituting the values in the equation 
2.6 L / 300 K = V / 284 K 
V = 2.46 L
New volume of the gas is 2.46 L