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The atomic mass is made up of all the protons and neutrons (which together form the nucleus) which each have a mass of approx. 1g. Therefore if the mass of the element is 19g and it has 9 protons (proton ...

Cao

Cao + H20 --> Ca(OH)2 

(ASSISTED WITH DIAGRAMS)

The electrons of a molecule are constantly moving around it in charge clouds, meaning that at any one point in time, the molecule's electrons could be more likely on one si...

Avogrado's constant = 6.02214086 × 10²³ mol^{-1 2.5/6.02=0.415 Ar of N = 14 Mr of N2 = 28 28 x 0.415=11.62}

Here is a summary on the steps to complete these question types. 

1. Determin oxidation numbers 2. Figure out what is being oxidised and what is being reduced. 3. Write half equations. 4. Balanc...