posted by rose on .
the mass of 2.50 mol of a compound with the formula ECl4, in which E is a nonmetallic element, is 385g. what is the molar mass of Ecl4? what is the identity of E?
sorry, sent it twicee
molecular weight of Cl =35.4g
2.50 mol=385g of ECl4
This means that
1 mole of ECl4= (1/2.50)*385g= molecular weight of 1 mole of ECl4
molecular weight of 1 mole of ECl4-4(35.4g)= molar mass of E.
look up the identity in the periodic table.