A solution of ammonium sulfate is combined with a solution of calcium chloride in a potential precipitation reaction. What is the coefficient in front of the precipitate in the molecular equation?

Which element is the least metallic between cadmium, silver, zinc, or iron?

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth