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n200080 [17]
3 years ago
13

Calculate the number of moles equivalent to 12.7 gram of iodine molecule ​

Chemistry
2 answers:
Alexus [3.1K]3 years ago
6 0

\LARGE{ \boxed{ \purple{ \rm{Answer}}}}

☃️ Chemical formulae ➝ \sf{I_2}

How to find?

For solving this question, We need to know how to find moles of solution or any substance if a certain weight is given.

\boxed{ \sf{No. \: of \: moles =  \frac{Given \: weight}{Molecular \: weight} }}

Solution:

❍ Molecular weight of \sf{I_2}

= 2 × 126.90

= 253.80

= 254 (approx.)

❍ Given weight: 12.7

Then, no. of moles,

⇛ No. of moles = 12.7 / 254

⇛ No. of moles = 0.05 moles

⚘ No. of moles of Iodine molecule in the given weight = <u>0.05</u><u> </u><u>moles </u>

<u>━━━━━━━━━━━━━━━━━━━━</u>

sveticcg [70]3 years ago
4 0

Answer:

<h3>The answer is 0.05 mol</h3>

Explanation:

To find the number of moles (n) we use the formula

n =  \frac{m}{M}

Where

n is the number of moles

m is the mass of the substance

M is the molar mass

To find the number of moles we must first find the molar mass

Since iodine is a diatomic molecule

M( <em>I</em> ) = 127 × 2 = 254 g/mol

Mass of iodine = 12.7 g

So the number of moles in 12.7 g of iodine is

n =  \frac{12.7 \: g}{254 \:  g/mol}

We have the final answer as

<h3>n = 0.05 mol</h3>

Hope this helps you

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