John Dobereiner proposed the idea of similarity in the properties of elements which can be placed together.
He proposed the idea of classification so that we can study the properties of a group of elements together
According to him, three elements can be grouped based on their similarities in properties. This group of three elements was termed as "Triads"
For example :
Li, Na, K
Now the significance of the triad was that the atomic weight of middle element is average of atomic weights of the side atoms
So atomic weight of Na = 23 is average of atomic weights of Lithium and Potassium
7 + 39/2 = 46/2= 23
The other triads were
Ca Sr Ba
Cl Br I
S Se Te
The answer is A. Prophase
(I took the quiz and this was actually the correct answer! 100% sure)
Decreasing the speed at which particles move.
That is the answer because less speed involves less energy to move each particle which translates to less energy being exerted on the container when the particle and the container collide. That would result in less pressure.
<u>Answer:</u> The standard Gibbs free energy of the reaction is -15.8 kJ/mol
<u>Explanation:</u>
Relation between standard Gibbs free energy and equilibrium constant follows:
where,
= Standard Gibbs free energy = ?
R = Gas constant = 
T = temperature = 298 K
= equilibrium constant = 581
Putting values in above equation, we get:
Conversion factor used: 1 kJ = 1000 J
Hence, the standard Gibbs free energy of the reaction is -15.8 kJ/mol
Answer:
In between 45% to 70%.
Explanation:
Find the given attachment.
