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bixtya [17]
2 years ago
15

Which of the following notations is the correct noble gas configuration for Li

Chemistry
2 answers:
Anettt [7]2 years ago
8 0

Noble gas configuration for Li : [He]2s¹

<h3>Further explanation </h3>

In an atom, there are levels of energy in the shell and sub-shell

This energy level is expressed in the form of electron configurations.

Lithium with atomic number 3, then the electron configuration:

1s²2s¹

And for noble gas configuration or it can be called Condensed electron configurations :

[He]2s¹

wlad13 [49]2 years ago
8 0

Answer:

[He]2s¹

Explanation:

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Significant figures communicates the level of precision in measurements.
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18. What is the percent by mass sugar of a solution made by dissolving 12.45 grams of sugar in 100 grams of water?
Fantom [35]

The percent by mass sugar of a solution : 11.07%

<h3>Further explanation</h3>

Given

mass of sugar = 12.45 g

mass of water = 100 g

Required

The percent by mass

Solution

Mass of solution :

\tt mass~sugar+mass~water=12.45+100=112.45~g

Percent mass of sugar :

\tt \%mass=\dfrac{mass~sugar}{mass~solution}\times 100\%\\\\\%mass=\dfrac{12.45}{112.45}\times 100\%=11.07\%

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2 years ago
Based on the passage , where in the United States would a physician encounter the most cases of SAD ?
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Answer/Explanation:

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Answer:

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22.4269 grams of sodium phosphate must be added to 1.4 L of this solution to completely eliminate the hard water ions

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