Answer: When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green.
Two moles because one moles would be 6.02×10 23 atoms 2 moles would equal twice that number of atoms
Explanation:
It's so because we know that stone is insoluble, ain't it, so it takes space in water & the water level rises.
But, when a spoon of sugar is added to water, it is soluble & hence mixes with water, so it doesn't rise.
I Hope this helps! (ㆁωㆁ)
A gamma ray has a mass and atomic number of 0 meaning it doesn’t effect the nucleus.
E.g
60 60 0
Co —> Co + gamma ray
27 27 0
