A food web is a graphic representation of all possible energy pathways through an ecosystem.
Answer:
pH = 4
Solution is acidic
Explanation:
Given data;
Hydronium ion concentration = 1 × 10⁻⁴ M
pH of solution = ?
Solution:
pH = -log [H₃O⁺]
pH = -log [ 1 × 10⁻⁴ ]
pH = 4
According to pH scale the pH 7 is neutral while the pH less than 7 is acidic and greater than 7 is basic. The given solution has pH 4 it means solution is acidic.
Answer:
Based on the information, the comparison of characteristics of two substances is as follow:
Substance A:
- Has a higher boiling point
- Has a higher heat of vaporization
Substance B:
- Has weaker intermolecular forces
- Is a gas at 300 mmHg
Explanation:
- The substance A has vapor pressure 275 mmHg so it has low vapor as compared to substance B so it has higher boiling point and has higher heat of vaporization.
- The substance B has vapor pressure of 459 mmHg so it has weaker intermolecular forces as compared to substance A and also it is a gas at 300 mmHg.
The second choice is the right answer.
Answer:
The volume percent is 8.71 % v/v
Explanation:
The volume percent (v/v) of the solution can be found using the following equation:
(1)
Where:
: is the solute volume = 28.3 mL
: is the solution volume = 325 mL
By introducing the above values into equation (1) we have the volume percent:
Therefore, the volume percent is 8.71 % v/v.
I hope it helps you!
