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tekilochka [14]
3 years ago
14

What is an element?​

Chemistry
2 answers:
nadya68 [22]3 years ago
8 0
Answer:
Each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and primary constituents of matter are called element. Each element is distinguished by its atomic number, i.e. the number of protons in the nuclei of its atoms.

Hope it helps u!
Andrews [41]3 years ago
5 0

Answer:

An element is a pure substance that cannot be converted further into anything simpler than itself by physical or chemical process

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Define atomic mass unit?​
sveticcg [70]

Atomic mass unit is the standard unit that is used for indicating mass on an atomic or molecular scale

8 0
3 years ago
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Where the values come from?
Scrat [10]

Answer:

To find the average atomic mass, you take a certain number of atoms, find the total mass of each isotope, and then divide the total mass of all the atoms by the total number of atoms. Assume that you have, say, 10 000 atoms of carbon

Explanation:

5 0
3 years ago
For each pair, choose the compound with the smaller lattice energy, and explain your choice: (b) K₂O or K₂S.
dlinn [17]

the compound with the smaller lattice energy is potassium sulphide here the size of the molecule play a important role

The quantity of energy released by the electrostatic attraction of oppositely charged ions is known as lattice energy (L.E). The ion's size and charge affect the lattice energy.

lattice energy is inversely proportional to   size of ion and directly proportional to charge of the ion. They are each charged equally that is plus two and minus two However, because the Sulphur is larger in size  and the oxygen is lesser in this case, The lattice energy of potassium oxide is larger  the lattice energy of potassium sulphide  is smaller.

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brainly.com/question/18222315

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5 0
1 year ago
Convert the pressure 525.4 torr to kPa.
Oduvanchick [21]

Answer:

Option A. 70.0 KPa.

Explanation:

Data obtained from the question include:

Pressure (torr) = 525.4 torr

Pressure (kPa) =?

The pressure expressed in torr can be converted kPa as shown below:

760 torr = 101.325 KPa

Therefore,

525.4 torr = (525.4 x 101.325) / 760 = 70.0 KPa.

Therefore, 525.4 torr is equivalent to 70.0 KPa.

3 0
3 years ago
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How many atoms are present in the following compound?<br> C21H22N2O2
alisha [4.7K]
Acetic Acid has two C atoms, four H atoms, and two O atoms, so the molecular formula is C2H4O2.
6 0
3 years ago
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