Answer: Option (a) is the correct answer.
Explanation:
It is known that molarity is the number of moles of a substance present in liter of a solution.
Mathematically, Molarity =
Symbol which represents molarity is "M". For example, a solution of 5.0 M means that molarity of the solution is 5.0 or the solution is 5.0 molar.
Thus, we can conclude that a solution that is labeled 5.0 M would be read as 5.0 molar.
<u>Answer:</u> The activation energy of the reaction is 124.6 kJ/mol
<u>Explanation:</u>
To calculate activation energy of the reaction, we use Arrhenius equation, which is:
where,
= equilibrium constant at 79°C =
= equilibrium constant at 26°C =
= Activation energy of the reaction = ?
R = Gas constant = 8.314 J/mol K
= initial temperature =
= final temperature =
Putting values in above equation, we get:
Hence, the activation energy of the reaction is 124.6 kJ/mol
<u>Answer:</u> The mass of produced is 889.38 g
<u>Explanation:</u>
We are given:
Moles of Al = 8 mol
Moles of = 10 mol
For the given chemical reaction:
By stoichiometry of the reaction:
If 3 moles of chlorine gas reacts with 2 moles of Al
So, 10 moles of chlorine gas will react with = of Al
As the given amount of Al is more than the required amount. Thus, it is present in excess and is considered as an excess reagent.
Thus, chlorine gas is considered a limiting reagent because it limits the formation of the product.
By the stoichiometry of the reaction:
If 3 moles of produces 2 mole of
So, 10 moles of will produce =
of
The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:
We know, molar mass of = 133.34 g/mol
Putting values in above equation, we get:
Hence, the mass of produced is 889.38 g