Write mole ratios for the following equation: 2H2 + O2 = 2H2O Write the ratios:
H2/O2
H2/H2O
O2/H2O

The following equation describes the burning of hydrogen gas to form liquid water. 2H2(g) + O2(g) → 2H2O(l ) Chemical equations give the following information about chemical reactions.

Explanation:

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.