Question

Алкен массой 31,5 г при гидротации образует 45 г спирта. Выведите формулу алкена.

Answer 1

Ответ смотри на фотографии

Answer 2

To find the formula of the alkene, we need to first determine the molar masses of the alkene and the alcohol formed during its hydration. Then we can use stoichiometry to find the molecular formula.

Step 1: Calculate the number of moles of alcohol (molar mass and moles) Molar mass of alcohol (product) = 45 g/mol Number of moles of alcohol = mass/molar mass = 45 g / molar mass of alcohol

Step 2: Determine the number of moles of the alkene (stoichiometry) The balanced equation for the hydration of an alkene to form an alcohol is: Alkene + H2O → Alcohol

Since the molar ratio between the alkene and alcohol is 1:1, the number of moles of the alkene is equal to the number of moles of the alcohol.

Step 3: Calculate the molar mass of the alkene (molar mass and moles) Molar mass of the alkene = mass/moles = 31.5 g / number of moles of alkene (which is the same as the number of moles of alcohol)

Step 4: Determine the empirical formula of the alkene Now, we can calculate the empirical formula of the alkene using the molar mass of the alkene. The empirical formula gives the simplest whole number ratio of atoms in the molecule.

Let's perform the calculations:

1. Calculate the number of moles of alcohol: Number of moles of alcohol = 45 g / molar mass of alcohol

2. Calculate the molar mass of the alkene: Molar mass of the alkene = 31.5 g / number of moles of alkene

3. Determine the empirical formula of the alkene: The empirical formula gives the simplest whole number ratio of atoms in the molecule.

For example, if the molar mass of the alkene is approximately 28 g/mol, then the empirical formula would be CH2 because the molar mass of carbon is 12 g/mol and the molar mass of hydrogen is 1 g/mol.

Without knowing the exact molar mass of the alkene, I can't provide the specific empirical formula in this case. You would need to provide the accurate molar mass of the alkene to determine its empirical formula.