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ValentinkaMS [17]
3 years ago
6

Which of these elements has an atom with the most stable outer electron configuration? * Cl Ca Ne Na

Chemistry
1 answer:
SashulF [63]3 years ago
6 0

Answer:

Neon (Ne) has the most stable outer electron configuration because the outer electron is completely filled and it has octet structure

Explanation:

The configuration of these elements is as follows;

Cl₁₇ = 2, 8,7 (the outer electron is 7)

Ca₂₀ = 2,8,8,2 (the outer electron is 2)

Ne₁₀ = 2,8 (the outer electron is 8)

Na₁₁ = 2,8,1 (the outer electron is 1)

Based on the outer electron value above, Neon (Ne) has the most stable outer electron configuration because the outer electron is completely filled and it has octet structure.

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Answer:

5.81L

Explanation:

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8 0
3 years ago
There are 3.45 moles of (NH4)2 SO4, how many grams is this?
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Answer:

455.4 g

Explanation:

Data given:

no. of moles of (NH₄)₂SO₄= 3.45 mol

mass of (NH₄)₂SO₄ = ?

Solution

Formula will be used

           no.of moles = mass in grams / molar mass

Rearrange the above equation for mass

           mass in grams = no. of moles x molar mass . . . . . . . . (1)

molar mass of (NH₄)₂SO₄

molar mass of (NH₄)₂SO₄ = 2(14 + 4(1)) + 32 + 4(16)

molar mass of (NH₄)₂SO₄ = 2 (14 +4) + 32 + 64  

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mass of (NH₄)₂SO₄ = 455.4 g

8 0
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4 0
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Calculate the solubility (in m) of cobalt(ii) hydroxide, co(oh)2(s) in h2o. ksp = 1.00×10-16 at a specific temperature.
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according to this reaction:

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              CO(OH)2 → CO2+  +  2OH-

intial                                0             0

change                           +X           +2X

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8 0
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