Answer:
The answer to your question is:
mass = 3.74 g
Explanation:
Data
V = (4/3) πr³
density = 1.74 g/cm³
radius = r = 0.80 cm
Process
V = (4/3) π(0.8)³ Substitution
V = 2.1446 cm³
mass = density x volume
mass = 1.74 x 2.1446 Substitution
mass = 3.74 g
I don't understand if the second section is also a question.
Answer:
0.2mol/kg
Explanation:
molality is the concentration of a solution in moles of solute per kilogram of solvent
moles of solute (NaOH) = 2moles
mass of solvent in kg. =10kg
Therefore molality. = 2moles/10 kg
=0.2mol/kg
