Answer: C - B - A - D
Explanation:
-Obtain a flask that is thoroughly cleaned
-Add the desired amount of stock solution
-Add deionized water until the volume reaches the mark on the flask.
- Cap the flask and invert several times to thoroughly mix the solution.
Answer:
–187.9 J/K
Explanation:
The equation that relates the three quantities is:

where
is the Gibbs free energy
is the change in enthalpy of the reaction
T is the absolute temperature
is the change in entropy
In this reaction we have:
ΔS = –187.9 J/K
ΔH = –198.4 kJ = -198,400 J
T = 297.0 K
So the Gibbs free energy is

However, here we are asked to say what is the entropy of the reaction, which is therefore
ΔS = –187.9 J/K
The density of water at 12°C is lower than the density of water at 20°C.
Now density is related to volume as per: density = mass / volume =>
mass = volume * density.
So, the greaer the density the higher the mass of the same volume of water.
Therefore, 100.0 ml of water at 12°C has a mass greater than 100.00 ml of water at 20 °C.