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3 years ago

A chemical reaction has two elements as reactants. Which type of reaction might occur?

1 answer:

7 0

The correct option is A.
A synthesis reaction is a type of reaction that occur between two or more elements which produce a single product. It is also called combination reaction.
For combination reaction, A + B = AB
For decomposition reaction, a single product is broken down into two or more components.
For single replacement reaction, a single free element will be substituted for one of the elements in a compound.
For double replacement reaction, two compounds exchange elements between each other.

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Calculate the energy, in joules, required to ionize a hydrogen atom when its electron is initially in the n =2 energy level. The

qaws [65]

Answer:

$E_{ionization}=5.45\times 10^{-19}\ J$

Explanation:

$E_n=-2.18\times 10^{-18}\times \frac{1}{n^2}\ Joules$

For transitions:

$Energy\ Difference,\ \Delta E= E_f-E_i =-2.18\times 10^{-18}(\frac{1}{n_f^2}-\frac{1}{n_i^2})\ J=2.18\times 10^{-18}(\frac{1}{n_i^2} - \dfrac{1}{n_f^2})\ J$

$\Delta E=2.18\times 10^{-18}(\frac{1}{n_i^2} - \dfrac{1}{n_f^2})\ J$

So, $n_i=2$ and $n_f=\infty$ (As the hydrogen has to ionize)

Thus,

$\Delta E=2.18\times 10^{-18}(\frac{1}{2^2} - \dfrac{1}{{\infty}^2})\ J$

$\Delta E=2.18\times 10^{-18}(\frac{1}{2^2})\ J$

$E_{ionization}=5.45\times 10^{-19}\ J$

4 0

4 years ago

Which of the following are testable?

jeyben [28]

you forgot the well answers

3 0

3 years ago

Read 2 more answers

What are two energy alternatives to fossil fuels?

Alex17521 [72]

Explanation:

solar and energy i had to answer this one before

5 0

2 years ago

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Which of the following ion is the least and the most hydrated? OH- , Li+, K+, Na+

vodomira [7]

I don’t know either lol

5 0

3 years ago

One mole of acetyl chloride was mixed with one mole of dimethylamine. After the reaction is complete, what species can be found

fredd [130]

Answer:

N,N-dimethylacetamide is formed.

Explanation:

It is an example of a nucleophilic addition-elimination reaction. Here dimethylamine acts as a nucleophile.
In the first step, dimethyl amine gives nucleophilic addition reaction at carbonyl center of acetyl chloride.
In the second step, removal of Cl atoms occurs.
In the third step, deprotonation takes place from amino group to produce N,N-dimethylacetamide.
Full reaction mechanism has been shown below.

7 0

4 years ago