Urea, NH2CONH2, is manufactured from ammonia and carbon dioxide according to the following equation: 2 NH3 (g) CO2 (g) -> NH2CONH2(aq) H2O What volume of ammonia gas at 25 o C and 1.5 atm is needed to make 500g of urea?

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Base your answer on the information below and on your knowledge of chemistry. nitrogen dioxide, no2, is a dark brown gas that is used to make nitric acid and to bleach flour. nitrogen dioxide has a boiling point of 294 k at 101.3 kpa. in a rigid cylinder with a movable piston, nitrogen dioxide can be in equilibrium with colorless dinitrogen tetroxide, n2o4. this equilibrium is represented by the equation below. 2no2(g) n2o4(g) + 58kj at standard pressure, compare the strength of intermolecular forces in no2(g) to the strength of intermolecular forces in n2(g).

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.