Answer:
It s a pure substance.
Explanation:
Can only be separated into its different elements by chemical means because it is connected by a chemical bond.
Molar mass 496.4200 g/mol
Number of moles:
40 g x 1 mol / 496.4200 => 0.08057 moles
Volume in liters:
250.0 mL / 1000 => 0.25 L
Therefore:
M = moles / V
M = 0.08057 / 0.25
= 0.32228 M
hope this helps!
Most liquids expand when they are heated and contract when they are cooled.
A thermometer consists of a bulb of liquid connected to a thin capillary tube.
When the liquid is heated, it expands and moves up the capillary column. When the liquid cools, it contracts and moves back down the column.
You can determine the temperature by reading the position of the liquid against a graduated temperature scale.
Make a ratio of the number of moles and do the calculations. Do you get it?