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4 years ago

Which electrons are the valence electrons of the atom?

Chemistry

2 answers:

Gnesinka [82]4 years ago

7 0

Answer:

Option C

Explanation:

The electrons that are the farthest away from the nucleus are valence electrons. These are electrons are present in the outermost shell which is also called valence shell.

Anastaziya [24]4 years ago

3 0

Answer:

$\boxed{C}$

Explanation:

The electrons farthest away from the nucleus are the valence electrons of an atom.

The valence electrons are the electrons orbiting in the last shell around the nucleus.

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When atoms are heated, what is also changing?

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4 years ago

How many grams of CuSO4 • 5H2O do you need to make 0.8 L of a 0.6 M solution

Bumek [7]

<h3><u>Unders</u><u>tanding</u><u> </u><u>the</u><u> </u><u>conc</u><u>ept</u><u>:</u><u>-</u></h3>

Here the concept of Molarity used .We will put the formula of Molarity then we find moles of copper sulphate .Then we can find the.Given weight of Copper sulphate.So let's do

<h3>Solution:-</h3>

Volume of Solvent=0.8L
Molarity=0.6M

We know

$\boxed{\sf Molarity=\dfrac{Moles\:of\: solute}{Volume\:of\: Solvent \:in\;L}}$

$\\ \rm\longmapsto Moles\:of\: solute=Molarity\times Volume\:of\: Solvent\:in\:L$

$\\ \rm\longmapsto Moles\:of\: Solute=0.8(0.6)$

$\\ \rm\longmapsto Moles\:of\: Solute=0.48mol$

Now

Molar Mass of Solute:-

$\\ \rm\longmapsto CuSO_4.5H_2O$

$\\ \rm\longmapsto 65u+32u+4(16u)+5(2\times 1u+16u)$

$\\ \rm\longmapsto 96u+64u+5(2+16)$

$\\ \rm\longmapsto 160u+90u$

$\\ \rm\longmapsto 250u$

$\\ \rm\longmapsto 250g/mol$

Now

$\boxed{\sf No\:of\:moles=\dfrac{Given\:Mass}{Molar\:Mass}}$

$\\ \rm\longmapsto Given\:Mass=No\:of\:Moles\times Molar\:Mass$

$\\ \rm\longmapsto Given\:Mass=250(0.48)$

$\\ \rm\longmapsto Given\:Mass=120g$

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3 years ago

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