What mass of iron is needed to react with 16.0 grams of sulfur

What kind of ion is contained in salts that produce an acidic solution? a positive ion that attracts a proton from water a positive ion that releases a proton to water a negative ion that attracts a proton from water a negative ion that releases a proton to water

Which other elements contain the same number of outer electrons as sodium

Joan writes four numbers on the board in standard form, and then she writes their scientific notation