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Sergeu [11.5K]
2 years ago
5

Give an example of an element and a compound. How do elements and compounds differ?

Chemistry
1 answer:
Talja [164]2 years ago
4 0

Answer:

Element: C (carbon)

Compound: CO2 (carbon dioxide)

Explanation:

You can differ the compouns to the elements because the compounds are a combination of elements. The elements are those that belong to the periodical table.

I hope I help you.

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A bottle.I has a neck and but a head

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3 years ago
What is the wavelength of radio waves that have a frequency of 3.20 x 1010 Hz?
Afina-wow [57]

The correct answer is A; or 9.38x10^-3.

Explanation:

f=3.20x10^10       c= 3.00x10^8

Once you divide those by each other, your answer is 9.83x10^-3

Hope this helps!! :)

6 0
3 years ago
Read 2 more answers
Identify the single displacement reaction. C4H12 + 7O2 ⟶ 6H2O + 4CO2 2H2 + O2 ⟶ 2H2O Al2S3 ⟶ 2Al + 3S Cl2 + 2KBr ⟶ 2KCl + Br2
Varvara68 [4.7K]

Answer:- Cl_2+2KBr\rightarrow 2KCl+Br_2

Explanations:-  The first reaction is combustion reaction as the hydrocarbon is burned in presence of oxygen to give carbon dioxide and water.

Second reaction is the synthesis reaction as in general a synthesis reaction looks like:

A+B\rightarrow AB

Third reaction is the decomposition reaction as it looks opposite of synthesis reaction.

AB\rightarrow A+B

In general, a single displacement reaction looks like:

AB+C\rightarrow AC+B

Fourth reaction is single replacement reaction as bromine is replaced by chlorine.

So, the correct choice is the last reaction, Cl_2+2KBr\rightarrow 2KCl+Br_2 .

8 0
3 years ago
How many valence electrons does K+ have
Lera25 [3.4K]

Answer:

About one valence electron

Explanation:

Obviously, removing that electron gives us [Ar] (same configuration as K1+), which is a noble gas and has 8 electrons. Valence electrons are generally regarded as being 'the outermost electrons' for a given atom. Therefore, with neutral potassium, there is one valence electron

5 0
3 years ago
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maxonik [38]
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3 years ago
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