What is used up in and stops a chemical reaction?

a - percent yield
b - limiting reactant
c - theoretical yield
d - excess reactant

Over the last 90 years, scientists have added to the body of evidence supporting the big bang theory. what is the latest piece of evidence discovered in 2014?

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

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.