Which of the following species is amphoteric? a)hco32- b) hf o c) nh4+ d) p042-

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

Ariver current has a velocity of 5km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. how can the velocity of the boat relative to the shore be calculated?

Ascientist conducted an experiment and discovered that certain plants grow faster when given a particular amount of fertilizer. anouther scientist conducted the same experiment and got similar results. which concept does this best illustrate? a) repetition b) replication c) precision d) validity