Answer:
A)
Explanation:
m = Mass of water = 38.9
M = Molar mass of water = 18 g/mol
= Avogadro's number =
The reaction of electrolysis would be
Number of moles of
From the reaction it can be seen that 2 moles of gives 1 mole of
So, number of moles of produced is
Number of molecules
So, of oxygen is produced.
Answer:- 544.5 mL of water need to be added.
Solution:- It is a dilution problem. The equation used for solving this type of problems is:
where, is initial molarity and
is the molarity after dilution. Similarly,
is the volume before dilution and
is the volume after dilution.
Let's plug in the values in the equation:
Volume of water added = 907.5mL - 363mL = 544.5 mL
So, 544.5 mL of water are need to be added to the original solution for dilution.
Answer:
<h2>15.72 cm³</h2>Explanation:
The volume of a substance when given the density and mass can be found by using the formula
From the question we have
mass = 45.6 g
density = 2.9 g/cm³
We have the final answer as
<h3>15.72 cm³</h3>Hope this helps you