In order to solve this, we need to make use of Hess' Law.
We are already given the equations and their corresponding deltaH. Using Hess' Law, we can generate this equation:
104 kJ = x - (-1182 kJ) - (-1144 kJ)
Among the choices, the answer is
<span>B.104 = x - [(-1182) + (-1144)]
</span>
Answer:
X and Z
Explanation:
If the difference in electronegativity between two atoms is greater than 1.7, they will form an ionic bond.
W and Z: 3.2 - 1.5 = 1.7 no
X and Z: 3.2 - 0.93 = 2.27 yes
Y and Z: 3.2 - 2.0 = 1.2 no
W and Y: 2.0 - 1.5 = 0.5 no
X and Y: 2.0 - 0.93 = 1.07 no
W and X: 1.5 - 0.93 = 0.57 no
X and Z are most likely to form an ionic bond together.
Hope this helps.
Answer:
open system
Explanation:
An open system is a system in which both energy and matter are exchanged with the surroundings.
Using a thin stationary phase supported by an inert backing, thin layer chromatography (TLC) is a chromatographic technique used to separate the components of a mixture.
It can be carried out on an analytical scale to track the development of a reaction or on a preparative scale to purify minute quantities of a chemical. Because of its simplicity, comparatively low cost, great sensitivity, and rapid separation, TLC is an extensively used analytical method. Similar to all chromatography, TLC works on the premise that a chemical will have varying affinities for the mobile and stationary phases, which will influence how quickly it migrates. TLC aims to produce well-defined, well-separated spots.
Learn more about thin layer chromatography here-
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