JEE Main 20266 AprilMorning Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 6 April
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Some Basic Concepts of Chemistry
JEE Main 2026 · 6 April · Morning Shift · Chemistry · Some Basic Concepts of Chemistry
An oxide of iron contains 69.9\% iron, its empirical formula, is:...
An oxide of iron contains iron, its empirical formula, is: (Given: Molar mass of Fe and O are and g mol respectively.)
Options
- A
- B
- C
- D
Correct answer
B.
Step-by-step solution
Mass percentage of
Mass percentage of
Number of moles of
Number of moles of
Molar ratio of
Dividing by the smallest value, the ratio is
Multiplying by to get the simplest whole number ratio, we get .
The empirical formula is .
Answer:
Mass percentage of
Number of moles of
Number of moles of
Molar ratio of
Dividing by the smallest value, the ratio is
Multiplying by to get the simplest whole number ratio, we get .
The empirical formula is .
Answer: