How many grams of copper would you need to add if you wanted to produce 8.000 grams of silver? the atomic mass of copper is 63.55 g/mol, and the atomic mass of silver is 107.87 g/mol.

Moles of solid copper used in reaction, using molar mass: 1 gram Cu @ 63.55 g/mol = 0.0157 moles Cu (f) Moles of solid silver produced in reaction , using molar mass: 3.395g Ag @ 107.87 g/mol = 0.317 moles of Ag Write the net ionic equation for the reaction between, using your mole values: 0.0157 Cu (s) & 0.317 Ag+ --> 0.0157 Cu+2 & 0.317 Ag (s) Convert to whole number ratio, by dividing by the smaller : 0.0157 moles Cu / 0.057 = 1 mole Cu 0.317 moles Ag+ / 0.157 = 2 moles Ag and rewrite the equation using the whole number ratio: 1 Cu (s) & 2 Ag+ --> 1 Cu+2 & 2 Ag (s)

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Heat is involved in chemical change in two ways; chemical changes either result in heat being added to or removed from an object, and chemical changes require a certain amount of heat before they can take place.