when two heavy hydrogens combine to for helium , it results in the formation of energy, and a neutron, along with the helium atom
The earths moon is most like going to differ in size or even color
Answer:
an ion is an element that has different numbers of protons and electrons
Explanation:
An ion is positive when it has more protons than electrons and negative when it has more electrons than ions.
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The second and first one but if it isn’t 2 choices then 1
Answer:
of HA is 6.80
Explanation:

Acid dissociation constant (
) of HA is represented as-
![K_{a}=\frac{[H^{+}][A^{-}]}{[HA]}](https://tex.z-dn.net/?f=K_%7Ba%7D%3D%5Cfrac%7B%5BH%5E%7B%2B%7D%5D%5BA%5E%7B-%7D%5D%7D%7B%5BHA%5D%7D)
Where species inside third bracket represents equilibrium concentrations
Now, plug in all the given equilibrium concentration into above equation-

So, 
Hence 