Copper(II) sulfate crystals, CuSO4.5H₂O, can be made by heating copper(II) oxide with dilute sulfuric acid and then crystallising the solution formed.
a
Calculate the maximum mass of crystals that could be made from 4.00 g of
copper(II)oxide using an excess of sulfuric acid.
CuO(s) + H₂SO4(aq) → CuSO4(aq) + H₂O(1)
CuSO4(aq) + 5H₂O(l) → CuSO4.5H₂O(s)

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the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

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