<u>Answer:</u> The volume taken from the reagent bottle must be 72.91 mL
<u>Explanation:</u>
To calculate the volume of concentrated solution, we use the equation:
where,
are the molarity and volume of the concentrated solution which is the reagent bottle.
are the molarity and volume of diluted solution which is the solution to be prepared.
We are given:
Putting values in above equation, we get:
Hence, the volume taken from the reagent bottle must be 72.91 mL
According to Data,
Mass Number = 65
# of Neutrons = 35
As we know,
Mass Number = # of protons + # of Neutrons
Solving for # of protons,
# of protons = Mass Number - # of Neutrons
Putting values,
# of Protons = 65 -35
# of protons = 30
As,
# of protons is the atomic number, so element with atomic number 30 is Zinc.
The cation derived from it has 28 electrons,
So, Zinc having 30 electron will be left with two extra protons, and each proton has +1 charge.
Result:
Zn²⁺
Answer:
C Fossil fuels will run out soon