Answer: The change in volume will be 9.30 L
Explanation:
To calculate the new pressure, we use the equation given by Boyle's law. This law states that pressure is directly proportional to the volume of the gas at constant temperature.
The equation given by this law is:
where,
are initial pressure and volume.
are final pressure and volume.
We are given:
Putting values in above equation, we get:
The change in volume will be (44.3-35.0)L = 9.30 L
Correct AnswerFourth Option, 2518 g
Solution:The formula of number of moles (n) in terms of mass of the compound(m) and molar mass of the compound (M) can be stated as:
We have the number of moles of Octane.
So,
n = 22.05 moles
We have the molar mass of octane.
So,
M=114.22 g/mol
Using these values in the above formula we can calculate mass of Octane (m).
Therefore, the mass of 22.05 moles of Octane is 2518 g.
Answer: E
Hope this helped :)
Answer:
3.4
Explanation:
The pH scale is used to express the acidity or basicity of a solution.
- If the pH < 7, the solution is acid.
- If the pH = 7, the solution is neutral.
- If the pH > 7, the solution is basic.
Given the hydronium ion concentration [H₃O⁺] = 3.8 × 10⁻⁴ M, we can calculate the pH using the following expression.
pH = -log [H₃O⁺]
pH = -log 3.8 × 10⁻⁴
pH = 3.4
This solution is acid.