Magnesium plus chlorine equals to magnesium chloride
6.32 KJ is how much heat is given off
You cannot find it if you do not know the information. Was there a molar mass given or do you know if it is asking for the molar mass?
No it does not ALWAYS go through all the stages because each rock forms differently at different rates. Igneous rock can weather to sediement rock, or melt to magma, however this does not necessarily mean it does this every time. It all depends on the temperature, wind, and pressure/heat.
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