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Rzqust [24]
3 years ago
13

Complete the balancing of this equation ; which shows the reaction between iron and carbon :

Chemistry
1 answer:
rewona [7]3 years ago
5 0

The balanced equation is Fe_{2} O_{3}  + 3CO ---> 2Fe + 3CO_{2}

<u>Explanation</u>:

                        Fe_{2} O_{3}  + 3CO ---> 2Fe + 3CO_{2}

  • 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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Can I please Get Help with this question ‍♂️ ?
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Answer:

Mg(NO4)2 is 180.3 g/mol

Explanation:

First find the substance formula.

Magnesium Nitrate.

Magnesium is a +2 charge.

Nitrate is a -1 charge.

So to balance the chemical formula,

We need 1 magnesium atom for every nitrate atom.

2(1) + 1(-2) = 0

So the substance formula is Mg(NO4)2.

Now find the molar mass of Mg(NO4)2.

Mg = 24.3 amu

N = 14.0 amu

O = 16.0 amu

They are three nitrogen and twelve oxygen atoms.

So you do this: 24.3 + 14.0(2) + 16.0(8) = 180.3 g/mol

So the molar is mass is 180.3 g/mol.

The final answer is Mg(NO4)2 is 180.3 g/mol

Hope it helped!

7 0
3 years ago
How many moles are in 4.3 x 10 ^22 molecules of Na3PO4
Sever21 [200]

Answer:

0.071 moles of Na₃PO₄ .

Explanation:

Given data:

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0.71× 10⁻¹ mol

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The number 6.022 × 10²³ is called Avogadro number.

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