47. For each of the following unbalanced chemical equations, suppose 10.0 g of each reactant is taken. Show by calculation which reactant is the limiting reagent. Calculate the mass of each product that is expected. a. C3H2(g) + O2(g) → CO2(g) + H2O(g)

b. Al(s) + Cl2(g) → AICI3(s)

c. NaOH(s) + CO2(g) → Na2CO3(s) + H2O(1)

d. NaHCO3(s) + HCl(aq) - NaCl(aq) + H2O(l) + CO2(g)​

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.