For example Cretaceous–Paleogene extinction event approximately 66 million years ago led to extinction<span> of approximately three quarters of the plant and animal in Earth. Dinosaurs extinct, but mammals adopt to new conditions and soon becaome one of the largest group in Earth.</span> Temperature drops unnaturaly in Earth's atmosphere. <span> This catastrophe end of the </span>Cretaceous<span> and entire </span>Mesozoic <span>Era and start the </span>Cenozoic<span> Era.</span>
Well there are 60 seconds in a minute and 60 minutes in an hour and 24 hours in a day so you would do 60×60 which is 3600. then you would multiply 3600 by 24 which would give you the number of seconds in a day, 86400. since you need the number of seconds in 2 days just multiply the amount by 2. your answer is: There are 172,800 seconds in two days.
<u>Answer:</u>
<em>The law of conservation of energy remains the same for any kind of chemical or physical energy. Since that happens inside laboratory or outside it anywhere in the nature.</em>
<u>Explanation:</u>
Any example that will be considered will demonstrate <em>no change in ultimate mass and any kind of energy</em> that is involved in the reaction can only change the form of its nature while the total energy remains conserved.
There can be <em>no gain or loss in mass or energy</em> in any reaction that takes place reactant and product and energy should remain same.
<em>For example rolling balls force </em>with which it is thrown the distance reached by the ball would depend on the frictional energy and air resistance acting on it and on considering these forces it shall remain equal to the original source.
Explanation:
For the given values of we will have the values of as follows.
As,
Therefore,
= 2.15, = 7.20
= 12.38
Now, at pH 6.50
;
At pH = 2.15;
;
At pH 7.20;
;
Hence, we can conclude that most abundant species is and the second most abundant species is .
Answer:
The value is
Explanation:
From the question we are told that
The concentration of is
The solubility product constant for is
The stability constant for is
Generally the dissociation reaction for NiS is
Generally the formation reaction for is
Combining both reaction we have
Gnerally the equilibrium constant for this reaction is
=>
=>
Generally the I C E table for the above reaction is
initial [ I] 0.091 0 0
Change [C] -4x +x + x
Equilibrium [E ] 0.091 - 4x x x
Here is x is the amount in term of concentration that is lost by and gained by and
Gnerally the equilibrium constant for this reaction is mathematically represented as
=>
=>
=>
=>
=>
=>
Square both sides
=>
=>
Solving using quadratic equation
The value of x is
Hence the amount in terms of molarity (concentration) of and produced at equilibrium is it then means that the amount of NiS (nickel(II) sulfide) lost at equilibrium is
So the molar solubility of nickel(II) sulfide at equilibrium is