I showed maturity when I turn 13 year old
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
Answer:
Balancing the charges in compound's ionic formula means ensuring that the sum of the charges of the radicals making up the ions is zero that is altogether, there is no net charge of the radicals
Explanation:
The guide to writing an ionic formula is as follows;
The radical with the positive charged ion or cation, is written first and the number of the atom with the charge is written as a subscript followed by the radical with the negatively charged ion, is written and the number of the atom possessing the charge is written as a subscript
The sum charges of the of positive and negative ions must be zero such that must be no net charge of the ions.
Answer:
An object could be traveling at a constant speed, but change directions
Explanation:
Hope that helps