It might change because of the amout of rain that fell in the year and the melting of ice which allows the water amount to increase
Two electron pairs is the answer
Answer is: mass of 1,58 mol of water is 28,44 grams.
n(H₂O) = 1,58 mol.
M(H₂O) = 2 · 2 g/mol + 16 g/mol.
M(H₂O) = 18 g/mol.
m(H₂O) = n(H₂O) · M(H₂O).
m(H₂O) = 1,58 mol · 18 g/mol.
m(H₂O) = 28,44 g.
n - amount of substance.
M - molar mass.
There are 2 manganese atoms are in Ba(MnO4)2.
They become an ionic bond, and are weakly bonded compared to covalently bonded atoms
