Please help Archimedes stated that objects that float displace water in amounts (weight) equal to the object's weight, while objects that sink
displace water volumes equal to the object's volume. Archimedes' hands-on work with the water displacement by objects and the use
of density to compare materials distinguish him as a scientist. Can the two Greek philosophers, Democritus and Aristotle, who argued
about the composition of matter be considered scientists, too? Explain.

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

In the lab, ammonia was mixed with water to form ammonium hydroxide. what is/are the reactant(s)? o water and ammonia o ammonia o ammonium hydroxide need