A buffer solution is prepared by adding NHACI to a solution of NH3 (ammonia)
NH3(aq) + H2O(l) + NH4+ (aq) + OH (aq)
What happens if HCl is added?

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Once similarity and one difference between a mixture of elements and a mixture of compounds

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