how many moles of ag can be produced if 250g of CU are reacted with excess agNo3, according to the equation Cu(s) + 2AgNO3(aq) -> 2Ag(s) + Cu(NO3)2(aq)?

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.