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xeze [42]
3 years ago
5

Which element is the most reactive? - Sodium - Nickel - Carbon -Oxygen

Chemistry
1 answer:
hodyreva [135]3 years ago
7 0

Answer:

In a reactivity series, the most reactive element is placed at the top and the least reactive element at the bottom. More reactive metals have a greater tendency to lose electrons and form positive ions .

Explanation:

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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

7 0
3 years ago
What is the balanced chemical equation for caffeine?
Olegator [25]
<span>C8H10N4O2 
Or do you want it in a reaction problem? 


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8 0
3 years ago
Which one of the following
mariarad [96]

Answer:

5

Explanation:

6 0
3 years ago
You collect 44.8 L of ammonia in excess hydrogen (N=14amu,H=1amu) . For the Haber process, N2+3H2â2NH3 , what volume of nitrogen
garik1379 [7]

Answer:

d

Explanation:

Firstly, we need to see the theoretical mole ratio between nitrogen and ammonia from the balanced chemical equation. This is 1 to 2. One mole of nitrogen yielded two moles of ammonia.

At STP, one mole of a gas occupies a volume of 22.4, hence we need to know the volume occupied by a volume of 44.8L of ammonia. This is equal to 44.8/2 = 2 moles

Now we have seen the actual number of moles of ammonia yielded. Since this is the same as the theoretical, it means that only one mole of nitrogen was also used up.

Since it is one mole, the volume at STP is thus 22.4L

4 0
4 years ago
2 - Slimotosis
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Initial observation is a nasty slime and a horrible odor.
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