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

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Fe2O3
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In a metallic bond, why positive ions are called kernels, not cations?
The kernel is an atom without its valence electrons that are weakly bonded; no electron belongs to one nucleus, valence electrons can move one kernel to another. So it is known as kernel, not cation (have valency).
Shiva Institute of Science and Technology
How do I manage between school and coaching in class 12?
Time Management is key. Just you have to see that school and class time do not collide.
Pradeep
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What if I change my coaching institute for my class 12 JEE preparation (I'm now in 11th)?
It depends upon the coaching centre and your comfort of getting the subject
Latha
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Is joining coaching mandatory in class 12?
Ultimately, whether or not to join coaching in class 12 is a personal decision that should be based on individual circumstances and preferences.
Hrhrh

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