Answer:
The answer to your question is 114.7% the percent is higher than expected.
Explanation:
Data
mass of HCl = 10.5 g
molar mass of HCl = 36.5 g
mass of NaOH = 19.3 g
molar mass of NaOH = 58.5
Process
1.- Write the balanced chemical reaction
HCl + NaOH ⇒ NaCl + H₂O
2.- Calculate the theoretical yield
36.5 g of HCl -------------- 58.5 g of NaCl
10.5 g of HCl -------------- x
x = (10.5 x 58.5)/36.5
x = 16.83 g
3.- Calculate the percent yield
% yield = (19.3/16.83) x 100
% yield = 114.7
is having lowest oxidation number of sulphur in teh options given. The oxidation number is -2.
The correct option is E.
Explanation:
have oxidation number of -2, which is lowest in all the options given.
In the given examples 
will have oxidation number zero because it is in elemental form. In the rules for oxidation number it is given that any element in free state has its oxidation number zero.
All other options are in compound form as:
S
= oxidation number is +4. It is calculated as oxygen having O.N of -2,
The charge on the atom is -2, so sum of the oxidation numbers of all the elements should be equal to -2.
x+3(-2)= -2
x = 4
S
= The charge on the atom is -2, so sum of the oxidation numbers of all the elements should be equal to -2.
x +4(-2) = -2
x = +6
The charge on the atom is -2, so sum of the oxidation numbers of all the elements should be equal to -2.
2x + 3(-2) = -2
2x = 4
x = 2
= oxidation number is -2 as the charge on ion in equal to its oxidation number.
To find the third side you would use Pythagorean theorem which is a²+b²=c².
A and B being the 2 legs and C being the hypotenuse.
Example: ( sorry for the really odd not really a triangle, triangle...)
| \
6| \ ? 6²+9²=C²
|_______ 36+81=C²
9 117=C²
√117=10.8 (rounded)
if you need to get the leg you just fill in the numbers.
Lemonade mix and water
Solvent: Water
Solute: Lemonade mix
