Question

Массовая доля углерода в алкене составляет 81,71% относительная плотность по воздуху 0,966. Определить формулу вещества.

Answer 1

0,966 = Mr алкена / 29

 Mr алкена = 0,966*29=28

CxH2x = 28

12x +2x =28

14x=28

x=2

C₂H₄ = этен/этилен

 

 

 

 

 

 

 

 

 

 

 

 

Answer 2

Determining the Formula of the Substance

To determine the formula of the substance based on the given information, we can use the mass percentage of carbon and the relative density.

The mass percentage of carbon in the substance is 81.71%, and the relative density with respect to air is 0.966.

Using this information, we can calculate the formula of the substance.

Calculation

The mass percentage of carbon is 81.71%, which means the remaining mass percentage is for hydrogen.

The mass percentage of hydrogen can be calculated as: \[100 - 81.71 = 18.29\]

Now, we can calculate the ratio of carbon to hydrogen in the substance.

The relative density with respect to air is 0.966, which can be used to calculate the molar mass of the substance.

Conclusion

Based on the given information, the formula of the substance can be determined as C₅H₁₀.