Chemistry - GCSE AQA - Combined Science - Higher: What is the formulae for iron oxide?

Question

What is the formulae for iron oxide?

yxng.edxn · Accepted Answer

Fe = 3+
O = 2+

We need to cancel these out if we want to get a neutral charge. To do this, they both need to be the same number, and they both go into six.
Two iron ions = Fe⁶⁺. Three oxygen ions = O⁶⁻.

= Fe₂O₃

yxng.edxn · Answer

Fe₂O₃

Chemistry - GCSE AQA - Combined Science - Higher

What is the formulae for iron oxide?

Fe = 3+ O = 2+ We need to cancel these out if we want to get a neutral charge. To do this, they both need to be the same number, and they both go into six. Two iron ions = Fe⁶⁺. Three oxygen ions = O⁶⁻. = Fe₂O₃

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