For the system: 2 HI(g) = H2(g) + 12(g), at 445°C, the value for Kc is 0.020. A mixture of H2, I2, and Hl in a vessel at 445°C has the following concentrations:
[HI] = 2.0 mol/L, [H2] = 0.50 mol/L and [12] = 0.10 mol/L
Which one of the following statements about Qc is TRUE for the above system?

pv=nrt

explanation:

answerlinnaeus;

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.