8. Given the following balanced equation. N2(g) + 3H2 + 2NH3(g)
What volume of ammonia gas (NH3) would be produced at 95.0 kPa and 70 °C if you were given a 28.0 g
sample of nitrogen gas (N2)? Note: Nitrogen - 14.0 and Hydrogen = 1.0

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.  

it was spontaneous.

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