Answer:
E = 17 kJ
Explanation:
The enthalpy of the reaction is:
<u>Where</u>:
Ep: is the energy of the products
Er: is the energy of the reactants
Similarly, the enthalpy of the reaction is related to the activation energy forward (
) and to the activation energy reverse (
) as follows:
Having that ΔH = 44 kJ and = 61 kJ, the activation energy of the reverse reaction is:
Therefore, the activation energy of the reverse reaction is 17 kJ.
I hope it helps you!
Answer:
when enough information is given to support a hypothesis (more info below)
Explanation:
If enough evidence accumulates to support a hypothesis, it moves to the next step known as a theory in the scientific method and is accepted as a valid explanation of a phenomenon. Tanner also explained that scientific theory is the framework for observations and facts.
hope I helped!
A molocule i think sorry if im wrong
The ratio of aluminum bronze components is:
92.0 Cu / 8.0 Al
The ratio of Cu and Al avilable is: 73.5 Cu / 42.2 Al
Then, it is evident that Al is in excess and Cu is the limitant material.
So, you need two work with the open proportion 92.0/ 8.0 = 73.5Cu / x
=> x = 73.5 * 8 / 92 = 6.39
Then, you can use 6.4 grams of Al and 73.5 grams of Cu to prepare 6.39g + 73.5g = 79.89.grams of Bronze.
I hope this helps.
The complete question is:
An aqueous solution of ammonium sulfate is allowed to react with an aqueous solution of calcium nitrate.
The net ionic equation contains which of the following species (when balanced in standard form)?
a. 2NO3-(aq)
b. Ca2+(aq)
Answer:
b. Ca2+(aq)
Ca2+ (aq) + SO4^2-(aq) --------------> CaSO4(s)
Explanation:
The overall ionic equation is:
Ca2+(aq) + 2NO3-(aq) + 2NH4+(aq) + SO4^2-(aq) ---------------> CaSO4(s) + 2NH4NO3(aq)
The NO3- and NH4+ are spectator ions as they do not participate in the formation of the precipitate CaSO4.
The net ionic equation is:
Ca2+ (aq) + SO4^2-(aq) --------------> CaSO4(s)
The spectator ions form the soluble ammonium trioxonitrate V
