Answer:
what do you want me to do my friend my best friend who is a dreamer
Answer:
1. Jupiter
2. Mercury
3. Venus
4. Venus
5. Jupiter
6. Neptune
7. Mercury
8. Saturn (used to be Jupiter)
Answer: option D. Their speed in a vacuum
Explanation:
Electromagnetic waves all have same speed in vacuum. This speed has been calculated to be 3x10^8m/s.
Given the freezing-point depression for a solution is 2. 5 °C and the cryoscopic constant is 4.5 °c/m, the molality of the solution is 0.56 m.
<h3>What is the freezing-point depression?</h3>
Freezing-point depression is a drop in the temperature at which a substance freezes, caused when a smaller amount of another, non-volatile substance is added.
The freezing-point depression for a solution is 2. 5 °C. We can calculate the molality of the solution using the following expression.
ΔT = Kf × b
b = ΔT / Kf = 2.5 °C / (4.5 °C/m) = 0.56 m
where,
- ΔT is the freezing-point depression.
- Kf is the cryoscopic constant of the solvent.
- b is the molality of the solution.
Given the freezing-point depression for a solution is 2. 5 °C and the cryoscopic constant is 4.5 °c/m, the molality of the solution is 0.56 m.
Learn more about freezing-point depression here: brainly.com/question/14115775
