Metallic copper is formed when aluminum reacts with copper (II) sulfate. How many grams of excess reactant would be left over if 54.0 g of Al reacts with 319 g of CuSO4?

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explanation:

answer; natural resources;

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atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8