CuSO₄·5H₂O the pentahydrate is the most common form
[Cu(H₂O)₄]SO₄·H₂O → [Cu(H₂O)₄]²⁺ + SO₄²⁻ + H₂O
blue
Answer:
FeCl2 + H. 2
Explanation:
Iron react with hydrogen chloride to produce iron(II) chloride and hydrogen.
Answer:
octet rule
Explanation:
It refers to the tendency of atoms to prefer to have eight electrons in the valence shell.
Answer : The photon energy of this light in units of nanometers, (nm) is, 
Solution :
Formula used :

where,
E = energy of photon = 
h = Planck's constant = 
c = speed of light = 
= wavelength = ?
Now put all the given values in the above formula, we get:


conversion used : 
Therefore, the photon energy of this light in units of nanometers, (nm) is, 