Answer:
1.It does not tells us whether a reaction proceeded completely or not.Like in some reactions some of the reactants remains unreacted and the chemical equation of this reaction doesn't tells us about it.
2.Chemical equations does not tells us/indicate the speed of reaction.I doesn't tell us how fast or how slow the reaction was.
3.It does not tells us about the physical changes like colour,state.So we have to mention it seperately.
4.It does not tell us about through which method the reaction proceeded.
5.Also in chemical reactions many intermediates are formed for a small amount of time.These are not expressed in a chemical equation...
PLZ RATE IT AND MARK AS BRAINLIEST....
It's must have a slot for an electron to attach itself to the iodine atom
The element that is a nonmetal, a gas, and has an element symbol that starts with the letter a is Ar (Argon).
Element Ar (Argon) is the third member of noble gases, in period 8, and makes up about 1% of the Earth's atmosphere. It has approximately the same solubility as oxygen and it is 2.5 times as soluble in water as nitrogen. It is an inert element that is colorless and odorless in both its liquid and gaseous forms.
Answer:
59.077 kJ/mol.
Explanation:
- From Arrhenius law: <em>K = Ae(-Ea/RT)</em>
where, K is the rate constant of the reaction.
A is the Arrhenius factor.
Ea is the activation energy.
R is the general gas constant.
T is the temperature.
- At different temperatures:
<em>ln(k₂/k₁) = Ea/R [(T₂-T₁)/(T₁T₂)]</em>
k₂ = 3k₁ , Ea = ??? J/mol, R = 8.314 J/mol.K, T₁ = 294.0 K, T₂ = 308.0 K.
ln(3k₁/k₁) = (Ea / 8.314 J/mol.K) [(308.0 K - 294.0 K) / (294.0 K x 308.0 K)]
∴ ln(3) = 1.859 x 10⁻⁵ Ea
∴ Ea = ln(3) / (1.859 x 10⁻⁵) = 59.077 kJ/mol.
Iodine and Calcium is the correct answer
