Answer:
B They move because of the convection currents in the mantle.
Answer: Electronegativity difference of F and Cl: 1.0 and is covalent
Explanation:
Heat of fusion is <span>the </span>heat<span> absorbed by a unit mass of a given solid at its </span>melting<span> point that completely converts the solid to a liquid at the same temperature. We use this concept to calculate the mass of copper. We do as follows:
H = m(Hfus)
112.4 = m (13.0) ( 1 mol / 63.55 g )
m = 549.4631 g -------> OPTION 3</span>
Hello, let me break this down for you! :)
A is your energy of your reactants, B is your activation energy, so the
total value could be found from B-Y. C is the value of your energy of
your products. X is your delta H value. So in this, your products are
higher energy than the reactants, so H is + and e2-E1 is positive so E2
>E1
Therefore your answers would just be <span>E2 > E1 and
</span><span>Hrxn<span> is positive.
Hope this helps! If you have any other questions or need further explanation just let me know! :)
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Lignite
This is the softest, youngest, and wettest rank of coal, often referred to as "brown coal" with a carbon content of only 25-35% and correspondingly lower energy content.