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Alex
4 years ago
9

L only need help whith 4 and 7​

Chemistry
2 answers:
quester [9]4 years ago
5 0
4 is C. And 7 is B. Moss
Inessa05 [86]4 years ago
3 0

4.a

7.moss

hope this helps you and have a good weekend

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NEED HELP WILL GIVE FOR BRAINLIEST PLEASE
SVEN [57.7K]

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3 years ago
Explain The element lithium has two common isotopes: Li–6 and Li–7 If the average atomic mass of lithium is 6.94004 u, determine
rosijanka [135]

Answer:

%Li-6 = 5.996% & %Li-7 = 94.004%

Explanation:

let X₁ = Li-6 & X₂ = Li-7 where Xₙ = mole fraction

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6·X₁ + 7·X₂ = 6.94004

=> 6(1 - X₂) + 7·X₂ = 6.94004

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X₁ = 1.00000 - 0.94004 = 0.05996 => %X₁ = %Li-6 = 5.996%

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3 years ago
How does an electron emit a photon?
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by lowering it's energy

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Which of the following is a mixture? <br> Gold <br> Honey <br> Steel <br> Water
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The option above that is correct to the question is 'Honey'.

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7 0
3 years ago
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Since you didn't have any extra information about the question I'll be presenting an example from my own textbooks that I've used.

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3 years ago
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