Answer:
-105 kJ
Explanation:
The enthalpy change of a reaction is the sum of the energy of the bonds of the reactants and the products. The bonds at the reactants are being broken, so it's an endothermic reaction, so the bond energy must be positive.
The bonds at the products are being formed, so the process is exothermic, and the bond energy must be negative. There are being broken 1 N≡N bond and 3 H-H bonds, and are being formed 6 N-H bonds:
Reactants: 945 + 3*432 = 2241 kJ
Products: 6*(-391) = -2346 kJ
ΔH = 2241 - 2346
ΔH = -105 kJ
The number of reactants is the same as the number of products is the best statement that describes the conservation of mass in chemical equation
<u>Explanation:</u>
- The conservation of mass conveys that the mass of an seperate system is neither destroyed nor created by the chemical reactions.
- Therefore there should be the same amount of matter when compared to the reactant and product side.
- If the reaction exists by satisfying the above condition it is said to be the balanced chemical equation.
- The Lavoisier stated the law on conservation of mass.
no, it contains 3 basic particles. (protons, electrons, neutrons)
hope this helped
Since the choices are not listed, it would be difficult to identify what is really the answer. The best I could do is to list some of the environmental consequences of the use of nuclear energy. This type of energy is said to have the lowest impact on the environment since it does not have eany emission that would cause air pollution, its waste is isolated from the environment and would only need a small amount of area of land. Although it has the lowest impact, it would still have an effect on the environment. One would be the amount of radiation that will be emitted when a meltdown would happen. This would affect not only the environment but all of the living things including humans. Also, it could cause eutrophication from the wastes. <span />