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A relevant equation is:

mass = moles x relative formula mass 

Also written:

m = n*M_r

This reaction is a 1:1 ratio of salicylic acid to...

When approaching a question like this I always find it easier to write out the equation with the known quantities written underneath each individual compound. ...

The relative formula madd of a compound comes from the total mass of all of the elments within the compound.

So in the case of calcium carbonate (CaCO₃) we have;

...

Use the equation mass(g) = moles x MrThe moles are given in the question, moles= 0.1 molLook at a periodic table to work out the Mr of CaCO3: Ca= 40 C= 12 O= 16 Therefore Mr= 40+12+(16x3)           = 100S...

In diamond the carbon atoms are bonded to four other atoms. Whereas, in graphite each carbon atom is only bonded to three other atoms. Therefore, there are delocalised (free) electrons in graphite, which ...