Answer:
54.9 kJ/mol
Explanation:
The relation between the activation energy (Ea) and the rate constant (k) is given by the Arrhenius equation.
where,
A is a collision factor
R is the ideal gas constant
T is the absolute temperature
Reaction B is one million times faster than reaction A at the same temperature. So .
Then,
Answer: The statement molecule cannot be accurately described by a Lewis structure consistent with the octet rule, is true.
Explanation:
As the chemical formula of water is and since it contains electronegative oxygen atom which also has 2 lone pair of electrons. Hence, lone pair-bond pair repulsion occurs due to which water has a bent shape structure.
The compound LiF contains metal lithium and non-metal fluorine. In order to obtain stability lithium donates its valence electron to the fluorine atom leading to the formation of an ionic bond. Hence, LiF is an ionic compound and not a covalent compound.
Generally, ionic compounds are polar in nature. For example, KOH is a polar compound and is a non-polar compound.
Thus, we can conclude that the statement molecule cannot be accurately described by a Lewis structure consistent with the octet rule, is true.