Given the reaction at equilibrium: NH4+ + OH H2O + NH3
Which species is the Brönsted-Lowry acid in the forward reaction?
1.
NH3
2.
H20
3.
ОН
4.
NH4+

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

Embryos of different species look very similar, which shows that the organisms share a ancestor.

There are main groups in the modern periodic table of elements