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Use equation: mole=mass/mr Calculate Mr of CO2 = 44Moles= 11g/44= 0.25 moles

Name of reaction is condensation polymerisation.Water is lost upon condensation of ethanedioic acid and ethane-1,2-diol (will draw this out on the whiteboard).

Ionic bonds are very strong, with elements involved in a compound having a full outer shell of electrons due to donating and accepting electrons, allowing them to be in a very stable state. In this case, ...

electrons, which are negative particles that are part of the atom, are transferred from potassium to sulfurtwo potassium atoms each lose one electron and they form K+ ions as they have lost negative charg...

So, the empirical formula means the smallest value, like the lowest common denominator in maths, but instead of fractions we are going to be using chemical formulae. I always find it easiest to set it out...