A student is performing experiments on a particular substance. Which statement is an observation of a chemical property of the substance?
A. It boils.
B. Electricity passes through it.
C. Its viscosity decreases.
D. It reacts with acid

The sum of the oxidation numbers in a neutral compound is always

What is the percent by mass of magnesium sulfate in mgso4.7h2o

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.