Answer:
[Glycerol] = 0.0205 mol/kg
Explanation:
Molality means concentration. This sort of concentration indicated the moles of solute which are contained in 1kg of solvent.
We start from molarity which are the moles of solute, that are contained in 1L of solution.
2.05×10⁻² mol/L are contained in 1 L of solution.
We must assume, that volume of solvent is 999.1 mL so let's determine the mass of solvent, by density
999.1 mL . 0.9982 g/7mL = 997.3 g
For molality we need mass in kg, so let's convert the mass of solvent
997.3 g . 1kg /1000g = 0.9973 kg.
Molality → mol/kg → 2.05×10⁻² mol / 0.9973 kg = 0.0205 m
atoms definitions and I hope this helps
Answer:
Physical change
Explanation:
Because it doesn't require any chemical to change
The compound CBr4 has the highest melting point of 91°C
