A bottle with 18.02 grams of water contains 6.0221 x 10^23 molecules of water. A ream of paper is 2.00 inches thick and contains 500.0 pieces of paper. If a stack of paper contained 6.0221 x 10^23 pieces of paper, how high would the stack of papers be in miles?

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .

the answer would be c

there are two significant figures.