Answer:
-586.56 kJ/mol is the standard enthalpy of the 3rd reaction.
Explanation:
...[1]
...[2]
..[3]
The unknown standard enthalpy of third reaction can be calculated by using Hess's law:
The law states that 'the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps'.
[2] - 2 × [1] = [3]
The standard enthalpy of the 3rd reaction is -586.56 kJ/mol.The negative sign indicates that energy is released during this reaction.
Answer:
(4) The navy needed a faster way to move ships between the Atlantic and Pacific Oceans.
Explanation:
The Panama Canal was an artificial eighty-two (82) kilometers water-way that connects the Atlantic Ocean with the Pacific Ocean in Panama and it enhanced maritime trades.
The construction of the Panama Canal became more important to the United States after the Spanish-American War because the navy needed a faster way to move ships
between the Atlantic and Pacific Oceans.
Covalent bonds form when electrons are shared between two nonmetals.
Answer is: 4.0 mol of lithium nitride would be produced.
Balanced chemical reaction: 6Li + N₂ → 2Li₃N.
n(Li) = 12 mol; amount of substance.
From chemical reaction: n(Li) : n(Li₃N) = 6 : 2 (3 : 1).
n(Li₃N) = n(Li) ÷ 3.
n(Li₃N) = 12 mol ÷ 3.
n(Li₃N) = 4 mol; amount of lithium nitride.
Answer:
0.72
Explanation:
if 760=1
550=x
=550÷760= 0.72 in two s.f
