an experimenter is testing different gasses for possible reactivity with each other by mixing them in a water-filled tube. for each observation listed below select the statement that best describes whether or not it indicates a chemical reaction has taken place.

Which best describes why nh4+ can form an ionic bond with cl-?

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.

Which of the following describes a situation where competition between producers exists