Which of the following is both a Lewis Base and a Brønsted Acid? a) H2PO4–
b) BF3 F–
c) PO43–
d) NH4+

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

Many pharmaceutical drugs are organic compounds that were originally synthesized in the laboratory. which two scientific disciplines are bridged by pharmaceutical drugs? chemistry and forensics chemistry and medicine biology and forensics biology and criminology

The fact that the total amount of energy in a system remains constant is a(n)