How many grams of dry NH4Cl need to be added to 2.00 L of a 0.500 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.73? Kb for ammonia is 1.8×10−5.

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.

The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as

Which of the following warnings would an agricultural chemist tell a farmer who wants to recycle his or her own ammonia? recycling ammonia is a difficult process that sometimes takes weeks. recycling ammonia requires a degree in biochemistry or a related field. recycling ammonia can be harmful because it is highly flammable and toxic. recycling ammonia costs too much money considering the price of the necessary chemicals.