If a sample of 4.50 moles of hydrogen gas react with excess nitrogen how many moles of ammonia gas would be produced

the pseudoscience are like beliefs, theories, or like practices that are considered scientific

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.