I think letter b were you put the letters so
Answer:
Molality = 8.57 m
Explanation:
Given data:
Molarity of solution = 5.73 M
density = 0.9327 g/mL
Molality of solution = ?
Solution:
Molality = moles of solute / kg of solvent.
Kg of solvent:
Mass of 1 L solution = density× volume
Mass of 1 L solution = 0.9327 g/mL × 1000 mL
Mass of 1 L solution = 932.7 g
Mass of solute:
Mass of 1 L = number of moles × molar mass
Mass = 5.73 mol × 46.068 g/mol
Mass = 263.97 g
Mass of solvent:
Mass of solvent = mass of solution - mass of solute
Mass of solvent = 932.7 g - 263.97 g
Mass of solvent = 668.73 g
In Kg = 668.73 /1000 = 0.6687 Kg
Molality:
Molality = number of moles of solute / mass of solvent in Kg
Molality = 5.73 mol / 0.6687 Kg
Molality = 8.57 m
The structure of the benzene is C6H6
Hey there!
A half-life means after a certain amount of time, half of that substance will have decayed after that time.
There are 3 half-lives in 72,000 years because 72,000 ÷ 24,000 = 3.
So, we divide the 100g sample in half 3 times.
100 ÷ 2 = 50
50 ÷ 2 = 25
25 ÷ 2 = 12.5
There will be 12.5g of the radioactive sample remaining after 72,000 years.
Hope this helps!
