Which of the following would you predict to have a positive value for δs?
a. agcl(s) → ag+(aq) + cl-(aq)
b. h2o(g) → h2o(l)
c. 2 na(s) + cl2(g) → 2nacl(s)
d. 2 na(s) + cl2(g) → 2nacl(s)

Which statement accurately describes the relationship between air pressure, air density, or altitude? as altitude increases, pressure increases.as altitude increases, air density increases.air pressure and density are lowest at sea level.denser air exerts more pressure than less dense air.

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

How do dying stars contribute to the formation of planets