Answer:
of the stock solution would be required.
Explanation:
Assume that a solution of volume
contains a solute with a concentration of
. The quantity
of that solute in this solution would be:
.
For the solution that needs to be prepared,
. The volume of this solution is
. Calculate the quantity of the solute (magnesium chloride) in the required solution:
.
Rearrange the equation
to find an expression of volume
, given the concentration
and quantity
of the solute:
.
Concentration of the solute in the stock solution:
.
Quantity of the solute required:
.
Calculate the volume of the stock solution that would contain the required
of the magnesium chloride solute:
.
Answer:
Explanation:
Entropy is measure of disorder so as we lower the temperature of gas , its entropy decreases .
Hence at - 200°C entropy of nitrogen will be less than that at - 190°C .
At freezing point ,
entropy of fusion = latent heat / freezing temperature
= .71 kJ / ( 273 - 210 )
= 710 / 63 J mol⁻¹ K⁻¹ .
= 11.27 J mol⁻¹ K⁻¹ .
entropy of fusion = 11.27 J mol⁻¹ K⁻¹ .
There are three basic types of magma: basaltic, andesitic, and rhyolitic, each of which has a different mineral composition. All types of magma have a significant percentage of silicon dioxide. Basaltic magma is high in iron, magnesium, and calcium but low in potassium and sodium.