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4. Nickel metal will react with silver nitrate solution to give metallic silver and a solution of nickel (II) nitrate: Ni,) + 2 AgNO3(a) 2 Ag s) + Ni(NO3)2 (as) If 15.32 g of nickel reacts with excess silver nitrate solution, calculate the mass of silver metal produced. 5. The average amount of energy required by the body every hour can be provided by the metabolism of 34.0 g of sucrose according to the equation: C12H201168) + 12 0268 12 CO2(g) + 11 H-06) What mass of oxygen is required to react with this mass of sucrose? 6. Aluminum oxide decomposes according to the equation: 2 Al-03 (6) 4 Alis) + 302 8) What mass of oxygen is produced when 1.50 kg of Al2O3 is decomposed in this manner