Which statement is true about the reaction shown by this chemical equation? HCI + NaOH -- NaCl + H20
A. It is endothermic.
B. It is exothermic.
C. It is a combustion reaction.
a
D. It is a synthesis reaction.

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?

Identify the correct mole ratio for each substance. sodium chloride (nacl) na: cl = 1: ammonium nitrate (nhno) h: o = 4:

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