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Katena32 [7]
3 years ago
12

Is Li has 7 valence electrons

Chemistry
2 answers:
Bumek [7]3 years ago
7 0
Lithium's valence electron configuration shell is actually 2s1. Lithium has 1 valence electron (outer most shell).
jeka943 years ago
3 0
This is false. The amount of electrons in lithium (Li) is not 7, it is 3. There are 3 electrons in lithium.
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An unknown compound has a percent composition of 52.10% potassium, 15.8% carbon, and 32.1% oxygen. The molar mass of the compoun
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To determine the empirical formula and the molecular formula of the compound, we assume a basis of the compound of 100 g. We do as follows:

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K    52.10     52.10/39.10 = 1.33         1.33/1.32 ≈ 1
C    15.8       15.8/12         = 1.32         1.32/1.32 ≈ 1
O     32.1      32.1 / 16       =  2.01        2.01/1.32 ≈ 1.5

The empirical formula would most likely be KCO.
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3 years ago
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What is the solution to the problem expressed to the correct number of significant figures? 12.0/7.11=?
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Answer:

1.69.

Explanation:

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So, the solution should contain 3 significant figures.

  • Now, the issue id of rounding; In a series of calculations, carry the extra digits through to  the final result, then round.
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7.20g of potassium sulfate reacts with the excess oxygen gas in a single displacement reaction, how many grams of oxygen are con
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The balanced chemical reaction:

K2SO4 + O2 = 2KO2 + SO2

Assuming that the reaction is complete, all of the potassium sulfate is consumed. We relate the substances using the chemical reaction. We calculate as follows:

7.20 g K2SO4 ( 1 mol / 174.26 g) ( 1 mol O2 / 1 mol K2SO4 ) ( 32 g / 1 mol ) = 1.32 g O2 consumed in the reaction.
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Sodium and ____ are the two primary electrolytes.Question 5 options:
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C, potassium. Hope this helps.

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