Answer:
0.2042 M is the original concentration of 
(aq) in the titrating solution.
Explanation:
Mass of 
= 0.217 g
Moles of 
1 mole of have 2 mole of As and 1 mole of 
have 1 mole of As.
So, from 1 mole of we will have 2 moles of
Then from 0.001096 mol of :
of
According to reaction, 1 mole of reacts with 2 mole of cerium (IV) ions,then 0.002192 mol of
of cerium (IV) ions.
Volume of the acidic cerium{IV) sulfate = 21.47 ml =0.02147 L
1 mL = 0.001 L
![[Ce^{4+}]=\frac{0.004384 mol}{0.02147 L}=0.2042 M](https://tex.z-dn.net/?f=%5BCe%5E%7B4%2B%7D%5D%3D%5Cfrac%7B0.004384%20mol%7D%7B0.02147%20L%7D%3D0.2042%20M)
0.2042 M is the original concentration of (aq) in the titrating solution.
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Answer:
the change is evaporation
Explanation:
the water heats up at the surface of the water and evaporates
Answer:
Pressure
Explanation:
The variable that describes how often the particles in a sample of gas collides with each other and the walls of the container is the pressure.
The pressure of a gas is the combined force with which the gas molecules bombard a unit area of the wall of the container i.e the sum of all the tiny pushes on the unit area of the wall of the container.
The various units of gas pressure atmosphere, millimeters of Hg, torr, pascal, newton per meter squared.
- Temperature is the degree of hotness or coldness of a body
- Volume is the space the gases occupies.
Answer B
<span>Potassium carbonate .
hope this helps!</span>
