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This is because when the metals are heated (burned), their electrons can briefly 'jump' from lower energy electron shells to higher energy electron shells. This requires energy to happen, and light is not...

First you must calculate the moles of Mg that originally reacted. moles = mass/Mr moles=48/24 moles= 2 Molar ratio of Mg to MgCl2 is 1:1 Therefore 2 moles of MgCl2 were produced moles= mass/Mr mass= moles...

Because chlorine exists as two isotopes, two molecular ions will be present, and their relative heights will correspond to the abundances of the isotopes. The tallest peak will be 3 times the height of th...

First we need to calculate the total mass of a CO₂ molecule. This is done by summing up the individual masses of all the atoms. To find these, we look at the periodic table and see that the mas...

The electrons in chlorine are further away from the nucleus and in a higher energy level (3p for chlorine as apposed to 2p for fluorine). Chlorines electrons are better shielded and so feel less nuclear c...