MikeDawn
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In the reaction 4Al+3O2→_Al2O3 , what coefficient should be placed in front of the Al2 to balance the reaction?
A.) 1
B.) 2
C.) 3
D.) 4

Respuesta :

Answer:

the answer is 2

Explanation:

In order to balance the equation, coefficient 2 should be placed in front of Al2O3.  

• A number placed in front of a chemical formula or symbol is termed a coefficient.  

• The coefficient shows that how many molecules or atoms of the reactants and products are taking part in the chemical reaction.  

• In a balanced equation, coefficients can represent either the number of moles or molecules, or atoms of each substance taking part in the reaction.  

• In the given reaction of, 4Al+3O3 ⇔ 2Al2O3, 2 should be placed in front of the product Al2O3 to balance the equation.  

Thus, the correct answer is option B, that is, 2.

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