How many moles of H2O are required to form 1.4 L of O2 at a temperature of 326 K and a pressure of 0.989 atm ?

For which one of the following reactions is the value of δh° rxn equal to δh° f for the product? a. 2 h2 (g) + o2 (g) → 2 h2o (l) b. n2 (g) + o2 (g) → 2 no (g) c. 2 h2 (g) + o2 (g) → 2 h2o (g) d. h2o (l) + 1/2 o2 (g) → h2o2 (l) e. none of the above

Embryos of different species look very similar, which shows that the organisms share a ancestor.

The clouds are grey and ground is wet. a quantitative b qualitative