Answer:
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Explanation:
Recycling reduces the demand for new wood is correct
Answer:
Chemical reaction are irreversible. Some of the example of chemical reaction are cooking, rusting, and burning. During a chemical reaction, the composition of substances changes and the particles rearrange to form a new substance. The new substance formed after chemical reaction of substance has different physical and chemical properties.
When a chemical reaction occur, the atoms or molecules of the substances change its physical and chemical properties such as while cooking of vegetable, the molecules of vegetable undergo changes in their properties and form a new substance which is different from the earlier.
Answer: The value of for the weak acid is .
Explanation:
First, we will calculate the molarity of HA as follows.
[HA] =
=
= 0.015
At equilibrium,
Initial: 0.015 0 0
Change: -x +x +x
Equilibm: 0.015 - x x x
It is given that, at equilibrium
[HA] = 0.015 - x = 0.013
- x = 0.013 - 0.015
= 0.002
Now, expression for of this reaction is as follows.
=
=
=
Thus, we can conclude that the value of for the weak acid is .