To get the number of moles of Cu, look up its molar mass. The mole ratio of Cu to Ag is 1:1 if the reaction is Cu(s) + AgNO3(aq) CuNO3(aq) + Ag(s).
Copper has a molar mass of 63.5 g/mol. Page 15 Molar Mass: An Overview The atomic mass of a copper atom is 63.5 amu. Copper has a molar mass of 63.5 g/mol.
You need to know the product's mass and its molar mass (g/mol), which is the mass of one mole of the product, in order to calculate the moles of a substance. The product's molar mass is then divided by the product's mass.
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