Question

How many molecules of HCL will be required to have 10 grams of it?
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Answer 1

Answer:

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Explanation:

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Answer 2

Reffer the achievement:

Given data:

• Mass of HCL. = 10 grams
• Molar mass of HCL = 36.5 grams

To find:

• Number of molecules = ?

Solution:

We know that;

●Number of particles=Number of moles × Avergardo number ( NA )

We can write it as:

●Number of molecules = Number of moles × Avergardo number ( NA ).

●Number of moles = Mass of a substance ÷ Molar mass of of a substance.

So the formula become

$\boxed{ \mathtt \red{n.o \: of \: molecule = \frac{mass}{molar \: mass} \times{N_{A}}}}$

By using this formula we can find the number of molecules so put values in the formula.

${\implies \mathtt{n.o \: of \: molecule = \frac{10}{36.5} \times{6.02 \times {10}^{23} }}}$

${\implies \mathtt{n.o \: of \: molecule = 0.27\times{6.02 \times {10}^{23} }}}$

$\implies\mathtt{1.64 \times {10}^{23} }$

Therefore,Number of molecules is 1.64×10²³.