What is the mass of 25.0 moles of lead(IV) sulfate (Pb(SO4)2)?

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Isec i will do it and them i will let you know

Try adding 700% because of the x in y

The internal energy of the system we can term it as total potential energy and kinetic energy. energy flows out of the surrounding from the system then we can say that the internal energy of the final state is lower than its initials. the sign of  δesystem is negative.δesystem = efinal - einitial=-ve  efinal  ∠einitial.