The mass of molecule of a compound is 2.66*10^-23. Calculate the no. of molecules im 30kg of the compound.
Answers
Answer:
Ionisation enthalpy
Alkali metals have the lowest
ionisation enthalpy compared to other
elements present in the respective period.
As we go down the group, the ionisation
enthalpy decreases due to the increase
in atomic size. In addition, the number
of inner shells also increases, which in
turn increases the magnitude of screening
effect and consequently, the ionisation
enthalpy decreases down the group.
The second ionisation enthalpies of
alkali metals are very high. The removal
of an electron from the alkali metals
gives monovalent cations having stable
electronic configurations similar to the
noble gas. Therefore, it becomes very
difficult to remove the second electron
from the stable configurations already
attained.
Hydration enthalpy
Lithium salts are more soluble
than the salts of other metals of group 1.
eg. LiClO4
is up to 12 times more soluble
than NaClO4
. KClO4
, RbClO4
and CsClO4
have solubilities only 10-3 times of that of
LiClO4
. The high solubility of Li salts is
due to strong solvation of small size of Li+
ion.
Answer:
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