Answer:
Molality is 0.40 m
Explanation:
Molality is a sort of concentration that indicates the moles of solute dissolved in 1kg of solvent.
To determine molality we need the moles of solute, and the mass of solvent in kg so:
We convert the mass of solvent from g to kg:
740 g . 1kg/1000g = 0.740 kg
We know the moles, so we can determine molality
Molality (mol/kg) = 0.295 mol/ 0.740kg = 0.40 m
Copper oxide
As the gas in the air i'm assuming it's Oxygen.
First, heat the solute to a high temperature, but not boiling. Next, dissolve the solute into the heated solution until the solute will no longer dissolve. Once that happens, take the heated solution off the heat and allow it to cool. Once the solution is cool you now have a supersaturated solution.
Answer:
NOUN
a thing that is composed of two or more separate elements; a mixture
Explanation:
basically a mixture
Answer:
4.5 g
Explanation:
Given,
Moles of water = 0.25 moles
Molar mass of water (
) = 
= 18 g/mol
The formula for the calculation of moles is shown below:
Thus,
<u>Mass of water in 0.25 moles = 4.5 g</u>
