What mass in grams of sodium carbonate, Na, Co, is produced if 50.0 g of sodium oxide, Na,0, are reacted
with excess carbon monoxide, CO, according to the fol-
lowing chemical equation? (Hint: see Sample Problem
8A.)
2Na, O(s) + CO(g) → Na, Co,(s) + Na(s)

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d

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Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .