What is the total number of valence electrons for cesium? ?

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

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.