Answer:
Water softening is the process of removing the dissolved calcium and magnesium salts that cause hardness in water
Explanation:
Answer : The concentration of 
ion is 
Explanation :
First we have to calculate the moles of 
.
The balanced chemical reaction will be:
From the reaction we conclude that,
1 mole of dissociate to give 3 moles of ion and 1 mole of 
ion
So,
0.03 mole of dissociate to give 
moles of ion and 0.03 mole of ion
Now we have to calculate the concentration of ion.
Therefore, the concentration of ion is
Pt195 having 78 atomic number is the daughter nucleus produced when Au195 undergoes electron capture.
An unstable isotopes can undergoes radioactive decay to form a more stable isotopes . Initial isotopes is called parent nuclide and the resultant isotopes from radioactive decay is called the daughter nuclide There are several radioactive decay like alpha decay , beta decay , gamma decay , electron capture etc .
In electron capture , the atom have only one less which is daughter isotopes than electron than atomic number of parent isotopes.
learn more about isotopes,
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The given question is incomplete. The complete question is :
Gaseous butane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . If 1.31g of water is produced from the reaction of 4.65g of butane and 10.8g of oxygen gas, calculate the percent yield of water. Be sure your answer has the correct number of significant digits in it.
Answer: 28.0 %
Explanation:
To calculate the moles :
According to stoichiometry :
13 moles of 
require 2 moles of butane
Thus 0.34 moles of will require=
of butane
Thus is the limiting reagent as it limits the formation of product and butane is the excess reagent.
As 13 moles of give = 10 moles of 
Thus 0.34 moles of give =
of
Mass of 
The percent yield of water is 28.0 %
Answer:
There are 3 significant figures
