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Bess [88]
3 years ago
7

If the number of atoms of each element in the products equals the number of atoms of each element in the reactant the equation i

s
a. an acid base reaction
b. balanced
c. spontaneous
d. not spontaneous
Chemistry
2 answers:
Misha Larkins [42]3 years ago
7 0

<u>Answer:</u> The correct answer is Option b.

<u>Explanation:</u>

Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another. Every balanced chemical equation follows law of conservation of mass.

This also states that total number of atoms of each element on the reactant side must be equal to the total number of atoms of each element on product side.

From the above information, the correct answer is Option b.

slavikrds [6]3 years ago
5 0

Answer : The correct option is, (b) balanced

Explanation:

Law of conservation of mass : It states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.

The balanced chemical reaction always follow the law of conservation of mass.

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

For example: The chemical reaction is,

2H_2+O_2\rightarrow 2H_2O

This reaction is a balanced chemical reaction in which number of atoms of hydrogen and oxygen are equal on the both side of the reaction. So, this reaction obey the law of conservation of mass.

Acid-base reaction : It is a reaction in which an acid react with a base to give salt and water as a product.

Spontaneous reaction : It is a reaction that favors the formation of products at the given set of conditions.

Non-spontaneous reaction : It is a reaction that does not favor the formation of products at the given set of conditions.

Hence, The correct option is, (b) balanced

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Limiting Reactant Worksheet
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Answer:

a) 1.61 mol

b) Al is limiting reactant

c) HBr is in excess

Explanation:

Given data:

Moles of Al = 3.22 mol

Moles of HBr = 4.96 mol

Moles of H₂ formed = ?

What is limiting reactant =

What is excess reactant = ?

Solution:

Chemical equation:

2Al  + 2HBr  → 2AlBr + H₂

Now we will compare the moles:

                Al              :               H₂

                  2              :               1

                 3.22         :            1/2×3.22 = 1.61 mol

                HBr            :              H₂

                 2                :               1

                4.96            :          1/2×4.96 = 2.48 mol      

The number of moles of H₂ produced by Al are less it will be limiting reactant while HBr is present in excess.

Moles of H₂ :

Number of moles of H₂ = 1.61 mol

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Answer:

The amount of energy released from the combustion of 2 moles of methae is 1,605.08 kJ/mol

Explanation:

The chemical reaction of the combustion of methane is given as follows;

CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (g)

Hence, 1 mole of methane combines with 2 moles of oxygen gas to form 1 mole of carbon dioxide and 2 moles of water vapor

Where:

CH₄ (g): Hf = -74.6 kJ/mol

CO₂ (g): Hf = -393.5 kJ/mol

H₂O (g): Hf = -241.82 kJ/mol

Therefore, the combustion of 1 mole of methane releases;

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2 × -802.54 kJ/mol or 1,605.08 kJ/mol.

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