Answer: Therefore, the volume of a 0.155 M potassium hydroxide solution is 56.0 ml
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.
According to the neutralization law,
where,
= molarity of 
solution = 0.338 M
= volume of solution = 25.7 ml
= molarity of 
solution = 0.155 M
= volume of solution = ?
= valency of = 1
= valency of = 1
Therefore, the volume of a 0.155 M potassium hydroxide solution is 56.0 ml
Answer:
b) Silicon and oxygen
Explanation:
A compound is a pure substance that contains two or more atoms chemically joined together. Sand is regarded as a 'compound' because it is made up of two or more atoms that are chemically bonded to one another.
Sand is said to predominantly contain silica, which has a chemical formula of SiO2. Hence, sand can be said to be a compound containing one atom of silicon (Si) and two atoms of oxygen (O2).
<span>Density is a value for
mass, such as kg, divided by a value for volume, such as m3. Density is a
physical property of a substance that represents the mass of that substance per
unit volume.
Density = 1.80 g / 2 L = 0.9 g/L</span>
Answer:
9.57
Explanation:
Given that:
Considering the Henderson- Hasselbalch equation for the calculation of the pOH of the basic buffer solution as:
![pOH=pK_b+log\frac{[conjugate\ acid]}{[base]}](https://tex.z-dn.net/?f=pOH%3DpK_b%2Blog%5Cfrac%7B%5Bconjugate%5C%20acid%5D%7D%7B%5Bbase%5D%7D)
So,
pH + pOH = 14
So, pH = 14 - 4.43 = 9.57
No, the distance from the first stop to the schools and the average speed is required.
