Which half-reaction correctly represents reduction? OA) Ca2+ - Ca + 2e-

OB) Ca2+ + 2e-

Ca

O C)2 F- + 2e- - F2

OD) 2F- - F2 + 2e-

What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.

Convert .347 kilometers to miles show your work

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).