Plz help asap A sample of gas occupies 129 mL at 1.67 atm and 291 K. The volume is
changed to 278 mL and the pressure is changed to 2.96 atm. What is the
new temperature in Kelvin?
A. -237 K
B. 265 K
C. 872 K
D. 1112K

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).