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3 years ago

Why do we crack molecules?

2 answers:

5 0

Cracking is the process whereby complex organic molecules such as kerogens or long chain hydrocarbons are broken down into simpler molecules such as light hydrocarbons,.
it is done to get more important substances

tino4ka555 [31]3 years ago

4 0

We need to crack molecules in order for us to get the desired molecule. For example, in the extraction of crude oil, after entering the fractional distillation, it will give products base on their molecular structure. The products are gasoline, diesel fuel, jet fuel, wax, asbestos,kerosene.

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A[?] is a heterogeneous mixture which settles on standing and its components can be separated by filtration. colloid suspension

Pani-rosa [81]

I think it should be suspension.

4 0

2 years ago

Read 2 more answers

The equilibrium-constant expression for a reaction written in one direction is the __________ of the one for the reaction writte

VLD [36.1K]

Answer:

reciprocal

Explanation:

The equilibrium constant for an equilibrium reaction is the ratio of the equilibrium constant for the forward reaction, Kf, to the equilibrium constant for the reverse reaction, Kr:

For A ⇄ B

The forward reaction is: A → B, with rate constant is Kf = K₁ and
The reverse reaction is: B → A, with rate constant Kr = K₂

$K_{eq}=\dfrac{K_f}{K_r}=\dfrac{K_1}{K_2}$

When you write the reaction in the other reaction, the forward and the reverse reaction are exchanged:

For B ⇄ A

The forward reaction is B → A, with rate constant Kf = K₂
The reverse reaction is A → B, with rate constant Kr = K₁

$K'_{eq}=\dfrac{K_f}{K_r}=\dfrac{K_2}{K_1}$

As you see:

$K'_{eq}=\dfrac{1}{K_{eq}}$

Thus, the equilibrium-constant expression for a reaction written in one direction is the  reciprocal___ of the one for the reaction written for the reverse direction.

8 0

4 years ago

What element s a halgen gas with a mass les than 19

dalvyx [7]

The halogens are Group 7. Group 7 consists of Flourine, Chlorine, Bromine, Iodine and Astatine.

Element Mass

Flourine 18.99
Chlorine. 35.5
Bromine. 79.9
Iodine. 126.9
Astatine 210

The answer is Flourine because it has a mass of less than 19 :) Hope this helps.

4 0

3 years ago

Which is a nonpolar molecule?

dedylja [7]

Answer:

Explanation:

A nonpolar molecule has no separation of charge, so no positive or negative poles are formed. In other words, the electrical charges of nonpolar molecules are evenly distributed across the molecule. Nonpolar molecules tend to dissolve well in nonpolar solvents, which are frequently organic solvents. The answer is hydrogen cyanide.

6 0

3 years ago

Give the formula for an ionic compound formed from each pair of ions

Vera_Pavlovna [14]

Please, find the complete question in the picture attached.

Answer:

1. Na₂O

2. AlF₃

3. MgO

4. Ca₃P₂

Explanation:

1. Na⁺ and O²⁻

An ionic compound will be formed when two ions of opposite charge attract each other.

The positive ion is called cation and the negative ion is called anion.

Thus, every ionic compound has a cation and an anion electrostatically bonded.

The ions must combine in a proportion that genders a neutral compound: so you must have as many cations as negative charge has one anion and as many anions as positive charge has one cation.

This is, if the cation has charge +x, there will be x anions, and if the anion has charge -y, there will be y cations.

Simbolically:

$Cation:A^{+x}\\ \\ Anion:B^{-y}\\ \\ Compound:A_yB_x$

As you see, the subscripts for each element in the chemical formula are obtained by the exchage of the charges of the ions.

Then, for Na⁺ and O²⁻, the subscript for Na will be 2 and the subscript for O will be 1; and the formula of the ionic compound formed by this pair ot ions is:

Na₂O

2. Al³⁺ and F⁻

The subscript of Al will be 1 (because the F ion has charge 1-, and the subscript of F will be 3 (because the Al ion has charge +3).

Thus the ionic compound formed by this pair of ions is:

AlF₃

3. Mg²⁺ and S²⁻

The charge 2+ from Mg atom wil become the subscript 2 of S atom, and the charge 2- will become the subscript 2 of Mg atom:

That results in the formula: Mg₂S₂

Except for some special compounds, the chemical formula is simplified, dividing by the least common denominator. In this case, that means that the two 2 subscripts are simplified to 1, and the final chemical formula for the ionic compound formed by this pair of ions is:

4. Ca²⁺ and P³⁻

The charge 2+ from Ca will become subscript 2 for P and the charge 3- whill become subscript 3 for Ca.

Hence, the ionic compound formed by these two ions is:

Ca₃P₂

7 0

3 years ago