Answer:
Ka = 4.9 x 10ˉ⁴
Explanation:
HOAc ⇄ H⁺ + OAcˉ
Ka = [H⁺][OAcˉ]/[HOAc]
Given pH = 2.58 => [H⁺] = [OAcˉ] = 10ˉ²∙⁵⁸ = 2.63 x 10ˉ³M
Ka = (2.63 x 10ˉ³)²/(0.0142) = 4.9 x 10ˉ⁴
Molality is defined as the ratio of moles of solute to the mass of solvent in Kg. It is also known as molal concentration.
Formula used for determining the molality is:
(1)
where,
= change in temperature
= freezing point depression constant
m = molality
Here, = and =
Put the above values in formula (1)
=
Hence, molality of nonvolatile solute is
Answer:
✔ habitat destruction
Explanation:
the 3 reasons are:
hunting
habitat loss
introduced predators
summed up its habitat destruction
The third option because the elements mentioned in that selection are in the same group, they must have similar properties.
Answer:
oceans rise and temputer in creses.
Explanation: