7.55 x 6.02 x 10²³ = 4.55 x 10²⁴ atoms
Answer:
C. The thermal energy of a substance.
Explanation:
Hope it helps.
First, we have to see how K2O behaves when it is dissolved in water:
K2O + H20 = 2 KOH
According to reaction K2O has base properties, so it forms a hydroxide in water.
For the reaction next relation follows:
c(KOH) : c(K2O) = 1 : 2
So,
c(KOH)= 2 x c(K2O)= 2 x 0.005 = 0.01 M = c(OH⁻)
Now we can calculate pH:
pOH= -log c(OH⁻) = -log 0.01 = 2
pH= 14-2 = 12
Answer:
4 boiling point elevation
Answer: Rate of decomposition of acetaldehyde in a solution is
Explanation:
Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.
For a reaction :
k= rate constant
x = order of the reaction = 2
Thus rate of decomposition of acetaldehyde in a solution is