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Determine the empirical formula of an oxide of iron which has 69.9% ir...

Determine the empirical formula of an ox | Class 11 Chemistry Chapter Some Basic Concepts of Chemistry, Some Basic Concepts of Chemistry NCERT Solutions

Question:

Determine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% dioxygen by mass.

Answer:

Empirical formula of a compound may be defined as the formula which gives the simplest whole number ratio of the atoms of various elements present in one molecule of the compound.

Form the available data Percentage of iron = 69.9

Percentage of oxygen= 30.1 Total percentage of iron & oxygen= 69.9+30.1= 100%

Step 1 calculation of simplest whole number ratios of the elements

Element	Percentage	Atomic mass	Atomic ratio	Simplest ratio	Simplest whole no ratio
Fe	69.9	55.84	69.9/55.84=1.25	1.25= 1	2
O	30.1	16	30.1/16 = 1.88	1.88=1.5	3

Step 2 writing the empirical formula of the compound

The empirical formula of the compound = Fe₂ O₃

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Comments

Silima aktar
2019-08-20 23:22:21

Why is mass dioxygen taken 16?

Swarnila
2019-08-16 12:17:37

But the question said dioxygen

Vikasini
2019-08-04 00:22:42

Excuse me actually the simplest whole number ratio should come Fe=1 & O=2 .why the answer is Fe=2 & O=3?

srushti
2019-08-02 21:48:08

Correct ans sir

Tapaswini singh
2019-07-30 10:13:46

But it's a dioxygen

Naivedhya
2019-07-27 08:58:11

Why is mass of oxygen taken 16?

Unnati
2019-07-22 22:20:34

Why to double the simplest whole number ratio

Uday thakur
2019-07-21 17:22:42

Thank you

Nikhil Singh
2019-07-21 11:36:18

Its gud

Zainab dharwala
2019-07-10 09:04:16

I think they had double the simplest ratio than it become 2 and 3

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Welcome to the NCERT Solutions for Class 11 Chemistry - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 3: Determine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% dioxygen by mass.....

Determine the empirical formula of an ox | Class 11 Chemistry Chapter Some Basic Concepts of Chemistry, Some Basic Concepts of Chemistry NCERT Solutions

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