2h2(g)+o 2(> 2 h2o(g)if eight moles of hydrogen react how many of moles of water are produced and how many moles of oxygen are required

As shown in the equation the molar ratio of H2 to H20 is 1:1, therefore if 8 moles of H2 are used, 8 moles of H2O are produced. However the molar ratio of H2 to O2 is 2:1 therefore the number of moles of O2 required is 8/2 = 4.

Hope this helps.

Hno3(aq) → h+(aq) + no3−(aq). picture ii best represents the strong acid hno3. strong acids are strong electrolytes