Answer:
Mass of water required to dissolve all KCl is 20.90 grams.
Explanation:
Mass of the sample = 41 g
Percentage of KCl impurity = 13%
Mass of KCl =
Solubility of = 7.1 grams per 100 grams of water at 20°C
Mass of
Solubility of = 25.5 grams per 100 grams of water at 20°C
Mass of
Then 1 gram of will dissolve in = grams of water
Mass of water required to dissolve 5.33 grams of :
Answer: 75.7 % yield
Explanation:
The balanced chemical equation is:
According to stoichiometry :
68.2 g of will require = 64 g of
Thus 7.5 g of will require = of
Thus is the limiting reagent as it limits the formation of product and is the excess reagent.
As 68.2 g of give = 96 g of
Thus 7.5 g of give = of
% yield=
Thus 75.7 % yield is there.
C becuase that is the one that you would have to do becuase that is the only option
First, we write the atom with 24 electrons. Atoms are neutral, so their electrons and protons are equal in number. The element with proton number 24 is chromium.
Next, a manganese atom has 25 electrons, so if it forms a cation with a +1 charge, it will have 24 electrons. Similarly, if an iron atom which normally has 26 electrons forms a +2 charge cation, it also has 24 electrons. The three symbols are:
Cr
Mn⁺¹
Fe⁺²
There you go. I gave you a image.