CHEMISTRY HIGH SCHOOL

How does chlorine react with ethene?By substituting hydrogen with chlorine.
By breaking a carbon double bond and adding chlorine.
By removing hydrogen because of chlorine’s attraction to hydrogen’s nucleus.
Chlorine and ethene do not react spontaneously.

Answers

Answer 1
Answer: Answer : Option B) By breaking a carbon double bond and adding chlorine.

Explanation : When chlorine reacts with ethene it forms dicholoroethane. It reacts spontaneously to form product. The halogenation reaction takes place in ethene across the double bonds and removes the hydrogen from ethene and two chlorine atoms gets attached in their place; which results in dichloroethane as the product.
Answer 2
Answer:

Answer: option B m

Explanation:

It is an example for Electrophilic Addition of Halogen. And addition of Cl2 to Alkene is always Trans Addition. That means both cl atoms should add opposite side of double bond and results vicinal 1,2-dichloroethane as a product.

CH2=CH2 + Cl2-------> ClCH2CH2Cl

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2. The energy of a photon that has a wavelength of 12.3 nm is _______ J.A) 2.72 x 10^-50B) 1.62 x 10^-17C) 4.42 x 10^-23D) 1.99 x 10^-25E) 1.51 x 10^-17
In what way are all sound waves and light waves similar?
Which element has a grater atomic radius ?phosphorus or bismuth?
For any given reaction, which of the following will speed up the reaction rate? a)increase the temperature b)add a catalyst c)increase the surface area d)All of the choices are correct. e)None of the choices are correct.
What is the total number of protons in an atom with the electron configuration 2-8-18-32-18-1?(1) 69 (3) 118(2) 79 (4) 197

What is the law of conservation of mass

Answers

The law of conservation of mass States that mass in an isolation system is neither created nor destroyed by chemical reactions or physical transformations and the mass of the products in a chemical reaction must equal the mass of the reactants.

Which subatomic particle(s) are found in the nucleus of the atom?. Enter the subatomic particle or particles separated by commas.

Answers

The subatomic particles found in the nucleus of the atom are:

Protons, Neutrons
The subatomic particles found inside the nucleons of the atoms are also referred to as the "nucleons". The nucleons are the protons, which are positively charged,  and neutrons, which are neutral. The negatively charged subatomic particles, electrons, are found outside the nucleus. 

What can be determined if only the atomic number of an atom is known?(1) the total number of neutrons in the atom, only
(2) the total number of protons in the atom, only
(3) the total number of protons and the total number of neutrons in the atom
(4) the total number of protons and the total number of electrons in the atom

Answers

Answer;

(4) the total number of protons and the total number of electrons in the atom

Explanation;

-Atomic number is the number of protons in the nucleus of an atom. An atom is made up of energy shells and the central nucleus. The energy shells contains electrons that are negatively charged while the nucleus contains protons (positively charged) and neutrons (neutral).

-In a neutral atom, the number of protons and electrons are equal, thus the atomic number would indicate the number of electron and protons in an atom. The sum of protons and neutrons on the other hand gives the mass number.

It is the "(4) the total number of protons and the total number of electrons in the atom" that can be determined if only the atomic number of an atom is known.

When [OH-] changes from 10-9 to 10-11 in a solution: Kw = [H+][OH-]

What is the [H+] after the change?

Answers

According to the fact that  [H+]*[OH-] is always equal Kw= 1x10^(-14), you can easily find concentration of [H+] by changing from 1*10^(-9)to 1*10^(-11)
H increases, Kw is constant, therefore 10^-14 / 10^-11 = 10^-3.
And you will have Hence [H+] = 10^-3 where pH is 3

Answer:

2

Explanation:

Find the number of moles of argon in 452 g of argon

Answers

no. of moles = given mass/atomic mass

= 452/40

= 11.3.

Thus, there are 11.3 moles
nó of moles =given mass/molar mass
no of moles=452/39.9
therefore no of moles=11.3moles

Doubling the number of particles of gas in an inflated tire will double the pressure of the gas in the tire.a. True
b. False

Answers

True - more particles will be able to hit off the tire wall, therefore higher pressure
True, I got it right on the test
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