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hammer [34]
2 years ago
8

Write the electron configuration for the elements whose atomic numbers are the following:

Chemistry
1 answer:
andreev551 [17]2 years ago
6 0

Answer:

3= Lithium (Li) = [He] 2s1

6= Carbon (C) = [He] 2s2 2p2

8=Oxygen (O)= [He] 2s2 2p4

13=Aluminium (Al)= [Ne] 3s2 3p1

U 2 can help me by marking as brainliest.........

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Common combustion reactions break the bonds of hydrocarbon molecules,

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When there is a chemical reaction between hydrochloric acid and potassium hydroxide. Which substances are the reactants? Which s
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Which table correctly identifies the subatomic particle's charge and mass?<br> a<br> b<br> c<br> d
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3 years ago
Which block on the periodic table contains the actinide series of elements?
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F BLOCK is the block on the period table that contains the actinide series of elements.

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4 0
3 years ago
An aqueous solution is 40.0 % by mass hydrochloric acid, HCl, and has a density of 1.20 g/mL. The mole fraction of hydrochloric
vivado [14]

Answer:

The molar concentration of HCl in the aqueous solution is 0.0131 mol/dm3

Explanation:

To get the molar concentration of a solution we will use the formula:

<em>Molar concentration = mass of HCl/ molar mass of HCl</em>

<em></em>

Mass of HCl in the aqueous solution will be 40% of the total mass of the solution.

We can extract the mass of the solution from its density which is 1.2g/mL

We will further perform our analysis by considering only 1 ml of this aqueous solution.

The mass of the substance present in this solution is 1.2g.

<em>The mass of HCl Present is 40% of 1.2 = 0.48 g.</em>

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Therefore, the molar concentration of HCl in the aqueous solution is 0.48/36.46 = 0.0131 mol/dm3

7 0
3 years ago
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