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3 years ago

Is this a compound, element, or mixture????

Chemistry

1 answer:

olga_2 [115]3 years ago

3 0

Answer:

element

Explanation:

hope this helps

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Which of the following is true for a nuclear reaction? Electrons are lost Electrons are gained Identity of element changes Ident

anyanavicka [17]

All nuclear chemistry revolves around changing the identity of base elements.

The answer is the third statement.

Because nuclear chemistry is changing base elements' identities, the atomic number/number of protons is what is changing. While the number of electrons can change, your question is too general to know whether electrons are going to be gained, lost, or retained in the reaction.

5 0

2 years ago

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If the oxidation state of H is +1 and O is -2, what is the oxidation state of C in C2H4O?

Sedbober [7]

Answer:

-1

Explanation:

According to this question, the oxidation state/number of H and O in C2H4O is +1 and -2 respectively.

The oxidation state of carbon in the compound can be calculated thus:

Where;

x represents the oxidation number of C

C2H4O = 0 (net charge)

x(2) + 1(4) - 2 = 0

2x + 4 - 2 = 0

2x + 2 = 0

2x = -2

Divide both sides by 2

x = -1

The oxidation number of C in C2H4O is -1.

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2 years ago

Gather data: Four other pairs of elements in the same chemical family are listed below. List the number of valence electrons in

Iteru [2.4K]

Explanation:

Valence electrons is the number of electrons in the outermost shell of an atom. For the main group elements, the group number represents the number of valence electrons.

Beryllium

This belongs to the group 2 hence, it has valency of 2.

Nitrogen

This belongs to group 5, hence it has valency of 5.

Oxygen

This belongs to group 6, hence it has valency of 6.

Fluorine

This belongs to group 7, hence it has valency of 7.

Magnesium

This belongs to group 2, hence it has valency of 2.

Phosphorus

This belongs to group 5, hence it has valency of 5

Sulphur

This belongs to group 6, it has valency of 6

Chlorine

This belongs to group 7, it has valency of 7

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2 years ago

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Lithium has the electron arrangement 2,1. When lithium forms an ion,

iragen [17]

Answer:

when lithium forms an ion it donates 1 electron

which makes its electron configuration to become 2

4 0

2 years ago

For 520.0 ml of a buffer solution that is 0.175 m in hc2h3o2 and 0.165 m in nac2h3o2, calculate the initial ph and the final ph

alisha [4.7K]

KWIJRJHO0907 X 023KO

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2 years ago