Sophie is looking at a small particle through a microscope. it has unique proteins in its cell wall, but no nucleus. it is shaped like a sphere. what is sophie observing? a. a virus b. a bacterial cell c. an archaeal cell d. a host cell

C. an archaea cell

Explanation:

Both bacteria and archaea have a cell wall, but the bacteria cell wall has peptidoglycan. The archaeal doesn't have peptidoglycan, but some unique proteins. They both also don't have nuclei. A virus doesn't have a cell wall, and a host cell, if eukaryote, would have a nucleus.

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"