Answer: C) An electron has a high probability of being in certain regions.
Explanation: How does the electron-cloud model describe electrons? An electron has a high probability of being in certain regions.
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Answer:
= -356KJ
<em>therefore, the reaction where heat is released is exothermic reaction since theΔH is negative</em>
Explanation:
given that enthalpy of gaseous reactants decreases by 162KJ and workdone is -194KJ
then,
change in enthalpy (ΔH) = -162( released energy)
work(w) = -194KJ
change in enthalpy is said to be negative if the heat is evolved during the reaction while heat change(ΔH) is said to be positive if the heat required for the reaction occurs.
At constant pressure the change in enthalpy is given as
ΔH = ΔU + PΔV
ΔU = change in energy
ΔV = change in volume
P = pressure
w = -pΔV
therefore,
ΔH = ΔU -W
to evaluate energy change we have,
ΔU =ΔH + W
ΔU = -162+ (-194KJ)
= -356KJ
<em>therefore, the reaction where heat is released is exothermic reaction since theΔH is negative</em>
The elements in a periodic table are arranged in the increasing order of their atomic number.
Answer:
It goes away
Explanation:
cause the IR light only can see through clean glass.
kilo is 1,000 times the base unit <em>(tip for remembering: think money, 1k is 1,000)</em>
centi is 1/100 of the base unit <em>(tip for remembering: cent = 100)</em>
micro is 1/1,000,000 of the base unit
nano is 1/1,000,000,000 of the base unit <em>(tip for remembering: </em><em>n</em><em>ano will have </em><em>n</em><em>ine zeroes)</em>
milli is 1/1,000 of the base unit
mega is 1,000,000 times the base unit