Question

Дано: ω(C)=83.33% Найти: Mr(CxHy)-?

Answer 1

M(элемента) = w(элемента) * m(соединения). 
n=m/ Mr
Пусть m(СxHy) = 100 г, тогда m(C) = 0,8333 * 100 = 83,33 г
w(H) = 100- w(C) = 16.63 = 0.1663
m(H) = 0.1663 * 100 = 16.63 г
n (C) = 83.33 / 12 = 6.94 моль
n(H) = 16.63 /1 = 16.63 моль 
n(C) : n(H) = 7 :16  
С7H16 гептан

Answer 2

Calculation of Mr(CxHy)

To find the molar mass (Mr) of a compound with the formula CxHy, we need to know the molar mass of carbon (C) and hydrogen (H). The molar mass of an element is the mass of one mole of atoms of that element.

The molar mass of carbon (C) is approximately 12.01 grams per mole (g/mol), and the molar mass of hydrogen (H) is approximately 1.008 g/mol.

Let's assume that we have a compound with the formula CxHy. To find the molar mass of this compound, we need to know the values of x and y. Unfortunately, the information you provided (ω(C) = 83.33%) does not give us enough information to determine the values of x and y.

To calculate the molar mass of the compound CxHy, we need to know the number of carbon (C) and hydrogen (H) atoms in the compound. If you have additional information about the compound, such as the number of carbon and hydrogen atoms or the molecular formula, please provide that information so that I can assist you further.