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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;

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First of all we must appreciate the general trend in these ionisation energies. The will always be endothermic (takes in energy) since we must put energy into a system to overcome the strong electrostatic...

Boron is the 5th element in the periodic table, and has an electron configuration 1s²2s²2p¹. The first ionization energy of Boron is the energy required to remove the s...

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 ...