Adynamic state where two opposing forces are in balance, where two opposite event are occurring at equal rate is

Which of the following is a compound? a.carbon b.oxygen c.hydrogen d.water

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

How many grams of ammonia would be produced by the decomposition of 16.93 mlof hydrazine? (the density of hydrazine is 1.021g/ml)