Answer:
7.28 mol
Explanation:
First find the Molar mass of Ba in the periodic table
which is 137.3
the unit of molar mass is g/mol
1000gx
7.28 mol
Your answer and workings are all mentioned in the picture below.
Answer:
0.075 is the mole fraction for HCl
Explanation:
Mole fraction = Moles of solute or solvent / Total moles
Total moles = moles of solute + moles of solvent
In this solution:
HCl is the solute
H₂O is the solvent
4.50 m means molal, 4.50 moles of HCl in 1kg of water.
Let's determine the moles of water
1000 g . 1mol/18 g = 55.5 moles
Total moles = 4.50 + 55.5 = 60.05 moles
Mole fraction of HCl = 4.50 / 60.05 → 0.075
Answer:
Computer.
Explanation:
The computer is moving more than the floor, at least, it's moving when people are typing on it.