
Y is Po-218.
<h3>Explanation </h3>

Here's the symbol of a particle in a nuclear reaction.
.
A stands for mass number. Z stands for atomic number. Both numbers shall conserve in a nuclear reaction.
- The mass number on the left hand side is 222.
- The two mass numbers on the right hand side add up to A + 4.
- 222 = A + 4.
- A = 218
So is the case for the atomic number. Try figure out the atomic number of Y using the same approach.
- The atomic number on the left hand side is 86.
- The two atomic number on the right hand side add up to __ + __.
- 86 = __ + __.
- Z = 84.
What element is Y? The atomic number of Y is 84. Refer to a periodic table. Element 84 corresponds to Po (polonium). Y is Polonium-218. The symbol of Y should be written as
. Hence the equation:
.
There are 6.02214*10^23 molecules , I'm not so sure about it though.
I want to say 8 but i'm not sure. I just did a lesson on this and my notes say it could be 8 but then again I'm not sure.
Answer:
The enantiomeric excess of the mixture is 48%
Explanation:
Enantiomeric excess refers to the excess of one enantiomer over the other in a mixture of enantiomers.
Enantiomeric excess = % of major enantiomer (R) - % of minor enantiomer (S)
= 74% - 26% = 48%.