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Brrunno [24]
2 years ago
7

How many protons electrons and neutrons are present in the following atoms​

Chemistry
2 answers:
grin007 [14]2 years ago
4 0

Answer:the element is potassium

the proton and electron is 19 and the nuetron is 19

Explanation:

Flura [38]2 years ago
3 0

Answer:

The atomic number gives the number of protons 19

p = 19

The atomic mass is the sum of the protons and neutrons

p+n = 39 p = 19

Put p into the equation and solve for n the neutrons

19+n = 39

Subtract 19 from both sides

19-19+n = 39-19

n = 20

The number of electons equal the number of protons in a neutral atom. The positive charge equal to the negative charge. The negative charge is the number of electons. This ion has a charge of +1. So solve for the negative charge.

-19+1 = -18

The negative charge is -18 so

e = 18

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Answer:

4.6\,\,moL\,\,L^{-1}

Explanation:

Molarity refers to a measure of concentration.

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Molarity refers to number of moles of solute present in this solution.

In order to find a solution's molarity, use value for the number of moles of solute  and the total volume of the solution expressed in liters

As molarity of 2.3 mol of Kl is dissolved in 0.5 L of water,

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Which law is based on the graph that is shown below? A graph is shown with pressure on the horizontal axis and volume on the ver
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<u>Answer:</u>

"Boyle's Law" is based on the graph that is shown below.

<u>Explanation:</u>

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Above the product of the initial volume and pressure is equal to the product of the volume and pressure after a change.

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