Mr. Romeo wants to make a solution of NaOH. He measures out 97.68 grams and puts it into 3 liters
1 answer:
Answer: Molarity of the solution is 0.813 M.
Explanation:
Given : Mass of NaOH = 97.68 g
Volume of solution = 3 L
The molar mass of NaOH is 39.99 g/mol. Hence, moles of NaOH are calculated as follows.
Molarity is the number of moles of solute present in a liter of solution. Therefore, molarity of given solution is calculated as follows.
Thus, we can conclude that molarity of the solution is 0.813 M.
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Explanation:
In order to find the molecular formula, we have to find the empirical formula first of all.
It is known that is a styrofoam, elements present are carbon and hydrogen atoms.
Element % Atomic mass Molar ratio Simple ratio
C 92.25 12.01 = 7.68
= 1
H 7.75 1.008 = 7.68
= 1
As empirical formula of styrofoam is C_{x}H_{x}.
Hence, empirical mass = (12.01 + 1.008) g/mol = 13.018 g/mol = 13.0 g/mol (approx)
Molar mass given is 104 g/mol.
So, =
= 8
Thus, we can conclude that molecular formula of the given styrene is .