What formula is used to calculate the molar mass of NH3? a
(3 x molar mass of N) + (1 x molar mass of H)
b
(1 x molar mass of N) + (3 x molar mass of H)
(3 x molar mass of N) + (3 x molar mass of H)
d
(1 x molar mass of N) + (1 x molar mass of H)

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.