A model of an axiomatic system that undefined terms is
a. an abstract model b. a concrete
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Litmus paper is made from water-soluble dyes which are extracted from lichens. this paper is used as an acid-base indicator. which of these common household substances would turn blue litmus paper red? a) bleach b) lye c) soap d) vinegar

How can you use chemical equations to predict the products of the reaction you can carry out?

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!