Stomach acid usually exist at a pH of 1.3; however, the addition of glycine can cause the pH to increase to 3.0 which results in acid reflux. Calculate the difference in hydronium ion concentration between the stomach under normal conditions and the stomach under acid reflux.

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