The epicenter was located somewhere on a circle centered at Recording station X, with a radius of 250 km.<span>
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Answer: d) -705.55 kJ
Explanation:
Heat of reaction is the change of enthalpy during a chemical reaction with all substances in their standard states.
Reversing the reaction, changes the sign of 
On multiplying the reaction by 
, enthalpy gets half:
Thus the enthalpy change for the given reaction is -705.55kJ
Answer and Explanation :
borax is a week base which is used as a primary standard solution to standardize the acid solution there is a very good property of borax that is does not decompose easily as we discussed above that it is a week base does not soluble in water easily, so it is very necessary to proper mixing of borax in water. If there is in proper mixing of borax then it will effect the not standardize the solution and error will be reflected as high alkaline concentration
Answer is:
1) orbital on C2 is sp2 hybrid orbitals and orbital on Cl is p atomic orbital.
Carbon atom is sp2 hybridized, it has three sp2 orbitals and one p orbital, they form four bonds. Three sp2 orbitals form three sigma bonds. Pi bonds are formed between two p orbitals on C1 and C2 atoms.
In sp2 hybridization the 2s orbital mixes with only two of the three available 2p orbitals.
2) the approximate C1-C2-Cl bond angle is 120°.
Answer:
The concentration of H3O+= 0.15M
Explanation:
From The equation of reaction
HClO2(aq) + H2O(l) ⇌ H3O+(aq) + ClO2−(aq)
0.25mol HClO2(aq) 0.25mol producesClO2−(aq) and x-mol of H3O+
Using Kc = [H3O+][ClO2-]/[HClO2]
0.15= 0.25*x/0.25
Simplify
x=0.15M
