Answer:
Freezing point solution = 70.131 °C
Explanation:
Step 1: Data given
Molality = 1.468 molal
A solution is created by dissolving biphenyl (C12H10) into naphthalene
Biphenyl is a non-electrolyte
Freezing point of naphthalene = 80.26 °C
Step 2: Calculate the freezing point depression
ΔT = i*Kf*m
⇒with ΔT = the freezing point depression = TO BE DETERMINED
⇒with i = the van't Hoff factor of biphenyl = 1
⇒with Kf = the freezing point depression constant of naphthalene = 6.90 °C/m
⇒with m = the molality = 1.468 molal
ΔT = 1 * 6.90 °C/m * 1.468 °C
ΔT = 10.13 °C
Step 3: Calculate the freezing point of the solution
ΔT = 10.13 °C
Freezing point solution = freezing point naphthalene - 10.13 °C
Freezing point solution = 80.26 °C - 10.129 °C
Freezing point solution = 70.131 °C
B) When describing very dilute solutions.
Explanation:
The most appropriate time to use ppm is when describing dilute concentrations of solutes in solutions. It is used mostly to determine trace amount of elements in water and soils.
- The part per million ppm is the amount of miligram of a solute in a liter of solution.
- It is similar to percentage.
- Minute and trace concentrations are very difficult to work with.
- Using parts per million, they become better appreciated and easy to use.
Learn more:
Parts per million brainly.com/question/2854033
#learnwithBrainly
Answer:
It is a physical change.
Explanation:
It is a physical change as the bone can be put into a cast ad can be repaired back to normal.
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➷ It is a solution or mixture
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Hey there!
N₂ + H₂ → NH₃
Balance N.
2 on the left, 1 on the right. Add a coefficient of 2 in front of NH₃.
N₂ + H₂ → 2NH₃
Balance H.
2 on the left, 6 on the right. Add a coefficient of 3 in front of H₂.
N₂ + 3H₂ → 2NH₃
This is our final balanced equation:
N₂ + 3H₂ → 2NH₃
Hope this helps!
