Answer:
The volume of the rock is 2 mL
Explanation:
The level to which the graduated cylinder is filled with water by Abby = 3 mL
The level to which the graduated cylinder after the rock is dropped in = 5 mL
Therefore;
The volume of the rock = The level to which the graduated cylinder after the rock is dropped in - The level to which the graduated cylinder is filled with water by Abby
The volume of the rock = 5 mL - 3 mL = 2 mL
The volume of the rock = 2 mL.
Answer:
To calculate the molarity of a solution it is necessary to know
- Moles of solute, or mass
- Volume of solution
Explanation:
Molarity means moles of solute, in 1L of solution.
If you firstly know the mass of solute, you can turn into moles like this:
Mass of solute / Molar mass of solute = Moles
Also, you should know the volume.
If those moles are in a certain volume, in 1L (or 1000 mL), how many moles, do you have. You should make a rule of three.
Molarity = moles / L
mmoles / mL
Answer:
Ba has the largest atom size
Answer:
As more sodium chloride is dissolved, higher is the boiling point of the solution
Explanation:
The boiling point- the temperature at which the solution boils- will increase as more solute is added. That is a colligative property called <em>boiling point elevation</em>. Colligative propeties are those that depend on the number of particles of solute in a solution. As more solute is added (sodium chloride or NaCl), more particles of solute will be present in the solution and the boiling point of the solution will be higher. The mathematical expression for the boiling point elevation (ΔTb) is the following:
ΔTb= Kb x m
Where Kb is a molal constant and m is the molality of the solution. That expression shows that the elevation of boiling point depends on the concentration of the solute expressed in terms of moles per mass of solution.