Answer:
0.74°C
Explanation:
The freezing point depression is a colligative property that can be calculated using the following expression.
ΔTf = Kf . b
where,
ΔTf: depression in the melting point
Kf: freezing point depression constant
b: molality
The mass of the solvent (benzene) is:
The moles of solute (naphtalene) are:
The molality of naphtalene is:
ΔTf = Kf . b
ΔTf = (4.90°C/m) . 0.972m = 4.76°C
The melting point of the solution is:
5.50°C - 4.76°C = 0.74°C
Answer:
<h2>0.059 moles</h2>
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
We have the final answer as
<h3>0.059 moles</h3>
Hope this helps you
Answer:
Wind between 39-46 mph can cause branches and limbs to break, make it hard for cars to stay on the road wind between 47-54 can cause lighting difficulties, wind between the 60-78 can cause trees to uproot and damage.
Explanation:
