Question

Пожалуйста помогите с химией!! Буду очень благодарна) 1) Какова масса кокса, необходимого для получения 1 т чистого железа восстановлением гематита ( Fe2O3), если кокс содержит 96% углерода ( если в результате реакции образуется оксид углерода(2) ) ? 2) Составив структурную формулу изомерного пропанола простого эфира, назовите его. 3) Составьте структурные формулы двух самых близких гомологов ацетона и назовите их.

Answer 1

1)Сх:Ну:Sz=nCO2(C)5,28/44:nH2O(H*2)3.24/18*2:nSO23,84/64=0,12:0,36:0,06=(0,06)=2:6:1
C2H6S. Mr=24+6+32=62 C2H6S
3)C2H2 ,C3H4-пропин, С4Н6-бутин

Answer 2

1) The mass of coke required to obtain 1 ton of pure iron by reducing hematite (Fe2O3) can be calculated using the stoichiometry of the reaction. The balanced equation for the reaction is:

2 Fe2O3 + 3 C -> 4 Fe + 3 CO2

From the equation, we can see that 3 moles of carbon (from coke) are required to produce 4 moles of iron. Since the coke contains 96% carbon, we can calculate the mass of coke needed as follows:

Molar mass of carbon (C) = 12.01 g/mol Molar mass of coke = 12.01 g/mol * (100 / 96) = 12.51 g/mol

Molar mass of iron (Fe) = 55.85 g/mol

To obtain 1 ton (1000 kg) of iron, we need to convert it to moles:

1 ton of iron = 1000 kg / 55.85 g/mol = 17895.4 mol

Now, using the stoichiometry of the reaction, we can calculate the moles of coke required:

4 moles of iron = 3 moles of carbon (from coke) 1 mole of iron = (3/4) moles of carbon 17895.4 moles of iron = (3/4) * 17895.4 moles of carbon

Finally, we can calculate the mass of coke required:

Mass of coke = moles of carbon * molar mass of coke Mass of coke = [(3/4) * 17895.4] * 12.51 g/mol

Please note that the above calculation assumes 100% efficiency in the reaction. In practice, there may be losses and inefficiencies during the process.

2) The structural formula of the isomeric propanol simple ether can be determined by considering the possible arrangements of atoms. Propanol is an alcohol with the molecular formula C3H8O. The isomeric propanol simple ether is formed by replacing the hydroxyl group (-OH) of propanol with an ether group (-O-).

There are two possible isomers of propanol simple ether:

1. Isopropyl ether: In this isomer, the ether group is attached to the central carbon atom of the propanol molecule. The structural formula of isopropyl ether is CH3-O-CH(CH3)2.

2. n-Propyl ether: In this isomer, the ether group is attached to one of the terminal carbon atoms of the propanol molecule. The structural formula of n-propyl ether is CH3CH2CH2-O-CH3.

3) The two closest homologs of acetone can be determined by considering compounds with similar structures and properties. Acetone (also known as propanone) is a ketone with the molecular formula C3H6O.

The two closest homologs of acetone are:

1. Methyl ethyl ketone (MEK): MEK is an isomer of acetone where the carbonyl group is attached to the second carbon atom of the propanone molecule. The structural formula of MEK is CH3COCH2CH3.

2. Diethyl ketone: Diethyl ketone is another isomer of acetone where the carbonyl group is attached to the third carbon atom of the propanone molecule. The structural formula of diethyl ketone is CH3CH2COCH2CH3.

These compounds are considered homologs of acetone because they have similar structures and properties, differing only in the arrangement of atoms within the molecule.