E answer is -60.57 = -60.6 KJ.
CaC2(s) + 2 H2O(l) ---> Ca(OH)2(s) +C2H2(g) H= -127.2 KJ
Hf C2H2 = 226.77
Hf Ca(OH)2 = -986.2
<span>Hf H2O = -285.83
Now,
</span><span>add them up. 226.77 - 986.2 + (2*285.83) = -187.77
</span><span>Add back the total enthalpy that is given in the question
-187.77+127.2 = -60.57
</span>
Answer:
Average atomic mass of potassium based on these relative abundances
Explanation:
The atomic mass of this element will be equal to the sum of product of its three isotopic masses and its fractional abundance
For isotope I -
Mass of Potassium-39 amu
Fractional abundance of Potassium-39 %
Mass of Potassium-40 amu
Fractional abundance of Potassium-40 %
Mass of Potassium-41 amu
Fractional abundance of Potassium-41 %
Average atomic mass of potassium based on these relative abundances
HBr (aq) is an Arrhenius acid.
The equation is <span>HBr(aq) -> H+ + Br-</span><span> </span>
Answer:
B. The region outside a nucleus where the electron is moving
Explanation:
The more the electron moves, the higher energy level it has, the slower the electron moves the lowwer energy level it has.
Answer: If you think about it, B. would be the most reasonable answer with the given factors.