What mass of chlorine reacts with 20.0 grams of iron to form iron (III) chloride? 2Fe + 3Cl^2 --> 2FeCl^3

PLZ HELP OUT ILL MARK U BRANEST!!

SHOW UR WORKING OUT CLEARLY

What is a scientific theory? a. a scientist's guess about how something works b. the results of an experiment obtained using the scientific method c. a proven fact that will never change d. an idea that is backed by data from many sources

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?

Joan writes four numbers on the board in standard form, and then she writes their scientific notation