Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?

The excretory system,need answers for all: )

Find the mass, in grams, of 5.00*10^23 molecules of f2

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?