Which term describes weathering?
2 answers:
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Answer : 42 grams of oxygen are required.
Explanation :
Step 1 : Write balanced chemical equation.
The combustion reaction of octane with oxygen can be written as,
Step 2 : Find moles of octane.
The given mass of octane is 12 g
Molar mass of octane is 114.2 g/mol
The moles of octane are calculated as,
We have 0.105 mol octane.
Step 3: Use mole ratio from balanced equation to find moles of O₂
The mole ratio of octane and O₂ is 2 : 25. Let us use this as a conversion factor.
We have 1.31 mol O₂.
Step 4 : Convert moles of O₂ to grams.
The molar mass of O₂ is 32 g/mol.
The grams of O₂ can be calculated as,
42 grams of oxygen are required.
<u>Answer:</u> The rate law for the reaction is
<u>Explanation:</u>
Rate law is defined as the expression which expresses the rate of the reaction in terms of molar concentration of the reactants with each term raised to the power their stoichiometric coefficient of that reactant in the balanced chemical equation.
In a mechanism of the reaction, the slow step in the mechanism determines the rate of the reaction.
For the given chemical reaction:
The intermediate reaction of the mechanism follows:
Step 1:
Step 2:
As, step 2 is the slow step. It is the rate determining step
Rate law for the reaction follows:
Hence, the rate law for the reaction is written above.