Answer:
2.1 kg of water
Explanation:
Step 1: Given data
- Moles of lithium bromide (solute): 4.3 moles
- Molality of the solution (m): 2.05 m (2.05 mol/kg)
- Mass of water (solvent): ?
Step 2: Calculate the mass of water required
Molality is equal to the moles of solute divided by the kilograms of solvent.
m = moles of solute/kilograms of solvent
kilograms of solvent = moles of solute/m
kilograms of solvent = 4.3 mol /(2.05 mol/kg) = 2.1 kg
HCl + NaOH ---> NaCl + H20
If you follow guidance from other questions I have already answered for you, you will see that the above equation is balanced as it is.
Answer: 204.2 g/mol
Explanation:
Elevation in boiling point is given by:
= Elevation in boiling point = 
= boiling point constant = 
m = molality
where,
n = moles of solute = 
= weight of solvent in g = 1g
Molality =
Putting in the values we get,
The molar mass of caryophyllene is 204.2 g/mol.
