Aluminium is extracted from aluminium oxide using electrolysis. Calculate the mass, in grams, of aluminium formed when a charge of 20 faradays
is passed through aluminium oxide dissolved in molten cryolite.
The ionic half-equation for the formation of aluminium is
Al3+ + 3e + Al​

where's the diagram?

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"