Use the ideal gas law to calculate the pressure in atmospheres of 0.21 mol of helium (He) at 16°C & occupying 2.53 L. You mu
st show all of your work to earn credit. **Don't forget to convert your Celsius temperature to Kelvin**
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This is an incomplete question, here is a complete question.
For the net reaction: 2AB + 2C → A2 + 2BC, the following slow first steps have been proposed.
(1) AB → A + B
(2) 2C + AB → AC + BC
(3) 2AB → A₂ + 2B
(4) C + AB → BC + A
What rate law is predicted by each of these steps?
Answer : The rate law expression for the following reactions are:
(1)
(2)
(3)
(4)
Explanation :
Rate law : It 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.
The general reaction is:
The general rate law expression for the reaction is:
where,
a = order with respect to A
b = order with respect to B
R = rate law
k = rate constant
and
= concentration of A and B reactant
Now we have to determine the rate law for the given reaction.
(1) The balanced equations will be:
In this reaction, is the reactant.
The rate law expression for the reaction is:
(2) The balanced equations will be:
In this reaction, and
are the reactants.
The rate law expression for the reaction is:
(3) The balanced equations will be:
In this reaction, is the reactant.
The rate law expression for the reaction is:
(4) The balanced equations will be:
In this reaction, and
are the reactants.
The rate law expression for the reaction is:
Answer: The correct option is A.
Explanation: The given molecules are the molecules of same element.
These molecules are considered as diatomic species.
Polar molecules are the molecules in which some polarity is present in the bond. These molecules are formed when there is some difference in the electronegativities of the elements. Example: HCl
Non-polar molecules are the molecules where no polarity is present in the bond. These molecules are formed when there is no difference in the electronegativities of the elements. Example:
The given molecules are non-polar in nature.
Hence, these molecules must be non-polar. So, the correct option is A.