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3 years ago

Why does water have a lopsided shape and act like a chemical magnet?

Chemistry

1 answer:

leva [86]3 years ago

4 0

Answer:

See below

Step-by-step explanation:

(a) Shape

The formula for water is H-O-H.

The central O atom has four electron pairs around it. They try to get as far from each other as possible, so they point toward the corners of a tetrahedron.

Only two of the pairs have a hydrogen atom attached, so water has a bent shape. The H-O-H bond angle is about 104°.

(b) Chemical magnet

The O atom has a greater attraction than H for the shared electrons in the O-H bonds, so the electrons spend more time near the O.

This gives the O atom a partial negative charge (pink in the diagram) and the H atoms a partial positive charge (blue).

The water molecule acts like a chemical magnet because its negative end attracts the positive ends of other molecules, while its positive ends attract the negative ends of other molecules.

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1 part Chlorine / 10 parts Water

Now to determine the amount of chlorine needed for 15 ounces of water, all we have to do is to use proportion. Let us say that the amount of Chlorine needed is x, therefore:

1 part Chlorine / 10 parts Water = x / 15 ounces Water

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1 / 10 = x / 15

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x = 15 / 10

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3 years ago

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ludmilkaskok [199]

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3 years ago

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Explain why the atomic mass of an element is usually not given as a whole number even though each individual atom of the element

Zinaida [17]

An atomic mass is the sum of the protons and neutrons of a given element. The atomic mass is given it what is called a weighted average of all the different kinds of that element. Take carbon for example. It has carbon-12, carbon-13, and carbon-14. The reason its atomic weight is so close to 12 (12.011 ish) is because carbon-12 is by far the most common, and carbon-13 and -14 are so uncommon, that the weighted average is close to 12, but not exactly 12.

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4 years ago

How many iron atoms are in 7.890 g of iron?

zhenek [66]

Answer:

see explanation

Explanation:

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2 years ago

A neutral atom of sodium (Na) has an atomic number of 11 and a mass number of 23. How many neutrons would be found in the nucleu

SCORPION-xisa [38]

<h3>Answer:</h3>

12 neutrons

<h3>Explanation:</h3>

A neutral atom is an atom that has no charge, which means it has no additional electrons or electrons removed from its energy levels.
An atom is made up of sub-atomic particles neutrons and protons found in the nucleus and electrons found in the energy levels.
The number of protons in the nucleus of a neutral atom is known as the atomic number.
In a neutral atom, the atomic number is equal to the number of electrons as protons are equal to the number of electrons.
The sum of protons and neutrons in the nucleus of an atom is known as the mass number of an atom.

Therefore;

Protons = Atomic number

Protons + neutrons = Mass number

Thus;

Neutrons = Mass number - protons or

= Mass number - atomic number

In this case;

Atomic number = 11

Mass number = 23

Thus;

Neutrons = mass number - atomic number

= 23 - 11

= 12 neutrons

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3 years ago