Lead II carbonate decomposes to give lead II oxide and carbon dioxide: grams of lead II oxide will be produced by the decomposition of 7.50g of lead II carbonate. BTW.. This is the third time I ask this question despite the problem solved and answer posted the answer gets deleted before I can view it by another person ..why, please help.

When preparing a tlc slide of a reference standard material (rsm), a solvent or mixture of solvents is used to dissolve the rsm and transfer it into the tlc plate. how does its polarity affects the rf of the rsm? the rf will increase depending of it polarity, but never decrease it does not affects it since the solvent evaporates before the insertion of the tlc slide in the jar a polar solvent will definitively reduce the retention factor a polar solvent will increase rf