Help plzz :(. You take a look at the label on a box of alka seltzer and find out that each tablet is 3.25 grams, with 1g Citric Acid, .325g Aspirin, and 1.900g Sodium Bicarbonate. Right away, you know that acids mixed with sodium bicarbonate produce carbon dioxide and water. This means the unbalanced equation for the reaction must be:

NaHCO3 + H3C6H5O7 → Na3C6H5O7 + CO2 + H2O

Your Challenge: Calculate how many alka seltzer tablets Charlie needs to buy in order to fill the basement with carbon dioxide. You should formulas and words to help your explanation.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

yes the answer is total mass in unchanged   : )