Thomson discovered negatively charged particles by cathode ray tube experiment in the year 1897. The particles were named electrons. J.J Thomson believed electrons to be two thousand times lighter than a proton. He assumed that an atom is composed of a cloud of negative charge in a sphere of positive charges
48g LiOH/ 23.95g = 2.0041 moles
Molarity= Mole of solute / liter of solution
Molarity= 2.0041 M
Molarity = 2.0 M
Answer 6:
True. Component of Mixture can be separated.
Explanation:
When the mixtures are formed there is little energy change. Hence, the components of Mixture can be easily separated by physical means like filtration, and distillation.
For example:
The muddy water containing pieces of clay, chalk, and water. These components can be separated by filter paper (filtration). After filtration ends there left the water. The chalk and clay got separated.
This is an incomplete question, here is a complete question.
The reduction of iron(III) oxide to iron during steel-making can be summarized by this sequence of reactions:
;
;
The net reaction is:
;
Write an equation that gives the overall equilibrium constant K in terms of the equilibrium constants K be sure you use their standard symbols.
Answer : The equilibrium expression will be:
Explanation :
The intermediate reaction are:
(1) ;
(2) ;
The net reaction is:
;
Now we are multiplying reaction 1 by 3 and reaction 2 by 2 and then adding both the reaction we get the net reaction.
(1) ;
(2) ;
If the equation is multiplied by a factor of '2' or '3', the equilibrium constant will be the power of 2 or 3 of the equilibrium constant of initial reaction.
If the equations are added then the equilibrium constant of the reactions will be multiplied.
Thus the equilibrium expression will be: