The mass of 2.47 moles of fluorine atom is 46.9 g
calculation
mass of Fluorine= moles x molar mass
moles = 2.47 moles
molar mass of fluorine = 18.998 g/mol
mass is therefore= 2.47 moles x 18.008 g/mol = 46.9 g
it is covalent because it does not dissolve in water
H+ ions are proton charged ions that are present
they showed mandeleeves predictions were correct
Acidic, basic. Also, 7 is neutral. Hope it helps! :)