Answer:
The formation of magnesium carbonate in the form of a precipitate and sodium sulfate as a byproduct takes place.
Explanation:
When a drop of sodium carbonate is mixed with the magnesium sulfate, the formation of MgCO3, magnesium carbonate as a precipitate, and Na2SO4, sodium sulfate as a byproduct takes place. One can separate magnesium carbonate from the sodium sulfate by using the process of filtration. The chemical reaction that takes place in the process is:
MgSO4 (aq) + Na2SO4 (aq) ⇒ MgCO3 (s) + Na2SO4 (aq)
A separation process in which the formation of solid takes place in a solution after undergoing a chemical reaction is termed as precipitation. The precipitate is the name given to the solid substance that gets produced in the reaction. The precipitate formed can be withdrawn from the solution with the help of a physical separation procedure like filtration.
The atomic mass unit, or amu, is 1/12 the mass of one atom of carbon-12. An atomic mass unit has the mass of 1/(6.0221415 * 10^23) grams.
Answer: Gold act as cathode.
Explanation:
Standard potential for an electrochemical cell is given by:
= standard electrode potential =
The 
values have to be reduction potentials.
Reduction potentials for given elements
The element Be with negative reduction potential will lose electrons undergo oxidation and thus act as anode.The element Au with positive reduction potential will gain electrons undergo reduction and thus acts as cathode.
Cathode : 
Anode : 
Thus gold act as cathode.
The system will adjust to this increase in the heat by promoting the dissolution reaction to absorb some of the heat energy
1.2*104 is 12000 it is easy just try ur best
