The excess reactant in the combustion of 211 g of methane in an open atmosphere is oxygen, O₂
<h3>What is a combustion reaction? </h3>
A combustion reaction is a reaction in which a substance burns in air (oxygen) to produce carbon dioxide and water.
<h3>Combustion of methane </h3>
Methane combust in air (oxygen) to produce carbon dioxide and water according to the following equation:
CH₄ + 2O₂ —> CO₂ + 2H₂O
From the question given above, we were told that 211 g of methane combust in an open atmosphere. This simply means that the amount of oxygen will be very high.
Therefore, we can conclude that oxygen will be the excess reactant since the reaction is carried out in an open atmosphere.
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To make the parts see how it’s going to go
The numbers of liters that is needed is 40 liters of 25% solution and 40 liters of 65% solution.
<h3>What is the litters about?</h3>
Note that:
We take x = volume of 25% solution.
We take y = volume of 65% solution.
So, Equation of total volume:
x + y = 80
Hence the equation of amount of acid:
0.25x + 0.65y = 0.45(80)
0.25x + 0.65y = 36
Solve x + y = 80 for x.
x = 80 - y
Then Substitute into the second equation.
0.25(80 - y) + 0.65y = 36
20 - 0.25y + 0.65y = 36
0.4y = 16
y = 40
x + y = 80
x + 40 = 80
x = 40
Therefore, The numbers of liters that is needed is 40 liters of 25% solution and 40 liters of 65% solution.
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Answer:
This story started on a very sepcial secert meeting of Kidz. You may be wondering who Kidz are and why are they having a secert meeting well these teens are the people who found the words "he will pervil" at the ruins that New York was about 500 years ago. The kids were decideing what to do figure out whats these mean or just leave it be. But as all stories go there will be twists and turns and these kids will find that friendship is the most important thing of all.
Explanation:
This kind of contract is a<u> unilateral contract </u>
<h3>Unilateral contract </h3>
A unilateral contract is a type of contract whereby only a party in the contract is willing to offer something in exchange for performance of the other party.
In the contract entered between Markel and Jaylin, Jaylin will pay Markel $600 for the painting but does not give Marke a time limit for delivering the job. Therefore the offer is based on Markel's performance and Markel is not fully obligated as well.
Hence we can conclude that the kind of contract is a unilateral contract.
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