The wax of a burning candle is a fuel that combines with oxygen in the air. As the fuel is consumed, what happens to most of the
energy stored in the bonds of the wax? A. It is used to produce work. B. It stays in the wax. C. It is released as potential energy. D. It is released as heat and light.
Energy cannot be created nor destroyed but can be converted from one form to another. This is the law of the conservation of energy. Energy is stored in the wax. When the wax is burnt, that energy is converted to another form of energy. In this case heat and light. Energy exists in various forms in nature. Energy is always converted from one form to another.
Reaction for precipitation is Pb(NO3)2(aq) + 2Nacl(aq)→PbCL2(s)+2NaNO3(aq) The given reaction is The mol of Nacl required is =2×mol of Pb(NO3)2 which is present. ∴M(Nacl)×V(Nacl) =2×M(Pb(NO3)2 ×V(Pb(NO3)2 o.100M×V(Nacl)=2×0.200 MX75.0ML V(Nacl = 300mL.
