Complete the balancing of this equation ; which shows the reaction between iron and carbon :
1 answer:
The balanced equation is
<u>Explanation</u>:
- For solving this first of all you figure out the formula of iron(3)oxide so you look at the periodic table as you said valency of iron is 3 positive because metals are always positive and oxygen’s valency is 2 (negative because non-metal). You criss-cross both you take 2 from oxygen and put it under the iron and then 3 from iron under oxygen.
- Valency is the number of electrons needed to be a noble gas. Oxygen has 6 electrons in the outer shell and it needs 2 more to become noble gas. The total number of electrons needed in every shell is 8 so to figure out valency you subtract the number of electrons in the outer shell from 8. Valency also shows how many electrons you need to share for bonding.
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Answer:
Explanation:
Single replacement reaction is a chemical reaction in which more reactive element displaces the less reactive element from its salt solution.
A more reactive element is one which can easily lose or gain electrons as compared to the other element.
As Magnesium is more reactive than tin, it can easily displace tin from its salt solution and form magnesium chloride and tin in elemental form.
The balanced chemical equation is: