Which is a statement of the law of conservation of mass? The total mass before a chemical reaction is the same as the total mass after the reaction. O Mass can be created or destroyed in a reaction. The total amount of mass is equal to the volume of both chemicals in the reaction. Every reaction creates an equal amount of mass related to the amount of energy required for the reaction.

Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.