Answer:
D
Explanation:
A and B are completely wrong and C is partial but D is the best option
Ions are formed when atoms lose or gain electrons in order to fulfill the octet rule and have fuller valence electron shells.
The chemical symbol for manganese is Mn.
Answer:
0.365 m
Explanation:
The <em>definition of molality</em> is:
- molality = moles of solute / kg of solvent
First <u>we calculate the moles of the solute, LiCl</u>. We do so using its <em>molar mass</em>:
- 0.317 g ÷ 42.394 g/mol = 7.48x10⁻³ mol
Then we calculate the mass of the solvent, water. We do so using its <em>density</em>:
- 20.5 mL * 0.9982 g/mL = 20.5 g
- 20.5 g / 1000 = 0.0205 kg
Finally we <u>calculate the molality of the solution</u>:
- 7.48x10⁻³ mol / 0.0205 kg = 0.365 m