6H2O represents 6 molecules of water
1 mole of any gas under STP has volume 22.4 L
So 2.50 moles of any gas ( including oxygen)
2.50 mol *(22.4L/1 mol)=56.0 L
Word Equation: Barium chloride solution reacts with sodium sulfate solution to produce sodium chloride and barium sulfate.
Location = nucleus ,
and you can see the total charge on the number that written below the substance, which would be 28+
hope this helps
They are lost from valence shell (it's outermost shell of an atom).
->>> outside the atom
