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Explanation it stated with half on 8 days then that means you divide 24 and 8 so its 3 and you have to multiply ✖ ½
The chemical formula for chlorophyll is C55H72O5N4<span>Mg. Only 1 of the 137 atoms comes from magnesium.
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1. 
- The changing of liquid to a gas.
2. 
- The major source of pollution.
3. 
- Carbon dioxide and water vapor trapping heat given off by Earth.
4. 
- Layer absorbing ultraviolet rays.
5. 
- The changing of a gas to a liquid.
6. 
- Layer responsible for reflecting radio waves.
7. 
- The layer in which weather changes.
Well not calculus because that has nothing, well mostly nothing to do with balancing chemical equation, so B or C. Now for me personally B is way faster, though C is sometimes faster if you get lucky the way to solve it is B
So the empirical formula is Mg3N2
