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vlada-n [284]
3 years ago
11

Which two parts of the atom are found in nucleus?

Chemistry
2 answers:
dsp733 years ago
7 0
Neutrons and protons. Hope this helps :)
faust18 [17]3 years ago
6 0

Answer:

protons and neutrons are found in nucleus

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How many vibrational modes does ethanol have? Explain why.
Artyom0805 [142]

Answer:

The ethanol has 21 vibrational modes.

Explanation:

A molecule can show 3 types of motions: one external called translational and two internal called rotational and vibrational.

In order to calculate the vibrational modes of a molecule we need to know the degrees of freedom of this molecule, it means the number of variables that are involved in the movement of this particle.

If we know that atoms are three dimensional we will know that they have 3 coordinates expressed as 3N. But the atoms are bonded together so they can move not only in translational but also rotational and vibrational. So, the rotational move can be described in 3 axes and the other vibrational move can be described as

3N-5 for linear molecules

3N-6 For nonlinear molecules like ethanol

So using the formula for nonlinear molecules where N is the amount of atoms in the chemical formula, so ethanol has 9 atoms

3(9)-6= 21

Thus, ethanol has 21 vibrational modes.

5 0
3 years ago
Match each state of matter to its description.
WARRIOR [948]

Answer:

Explanation:

solid would be a wall e.g

liquid would be water e.g

gas would be oxygen e.g

6 0
3 years ago
Which of the following pairs of atoms do NOT exhibit a covalent bond?
SCORPION-xisa [38]
The answer is Cs and F. S and O  are both non-metals and if I am not mistaken they are both on the right side of the periodic table. S and O exhibit a covalent bond, the other pairs do too except for the first pair of atoms.  Therefore, the answer is  A. Cs and F.
4 0
3 years ago
Which of the following fractions can be used in the conversion of 25 m3 to the unit cm3?
zaharov [31]

your answer would be C hope this helps

8 0
3 years ago
what is matter that can not be divided into two or more diffrent types of matter by any physical or chemical called/
VikaD [51]

Answer an atom

Explanation:

6 0
3 years ago
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