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Archy [21]
3 years ago
10

How did life begin? need asap

Chemistry
2 answers:
3241004551 [841]3 years ago
5 0

From KimbeKimbe21 in a comment section found on the page:

"The earth began to be formed over 4.5 billion years ago,but for millions of years nothing could live here.Gradually,the earth's crust and the atmosphere formed.The simplest fo…rm of life, bacteria and algae,probably began to grow less than four billion years ago.Human beings did not appear until about two million years ago."

stealth61 [152]3 years ago
4 0
Birds and bees. Adam and Eve
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Calculate the number of moles equivalent to 12.7 gram of iodine molecule ​
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\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>

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