Half of the subjects (the study volunteers) were given a placebo. The other half were given the vaccine. This created two groups: the placebo group and the vaccine group. The study used a random process to choose which subjects were assigned to each group. Why would subjects be randomly assigned to the groups?

The rules of engagement (roe) working group is often used to (select all that apply.)

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?

Match each term to its description. match term definition excess reactant a) reactant that can produce a lesser amount of the product limiting reactant b) amount of product predicted to be produced by the given reactants theoretical yield c) reactant that can produce more of the product