Which of the species in the forward reaction below is acting as a base?
nh4+ + h2o ⇌ nh3 + h3o+
nh3
h2o
nh4+
h3o+

Explanation:

The definition of a Brønsted-Lowry base is that it is a substance that is capable of accepting a H+ ion using one of of its lone pairs to bond to the H+ ion. We can clearly see here that the water molecule accepts the H+ ion from NH4+ and becomes H3O+ and it is for that reason that in the forward reaction, water acts as a base.

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

50.23 i believe is correct but don't quote me on that.