Indicate the physical state (solid, liquid, or gas) for each of the following at the given temperature.

(a) H₂O at -10 °C

(b) H₂O at 110 °C

(c) NH₃ at -100°C

(d) NH₃ at -50 °C 

The melting points and boiling points for water and ammonia are as follows.

Compound water, HO ammonia, NH3 Melting Point 0 C -78 C Boiling Point 100 C -33 C