What is the perceived frequency of a sound wave

The perceived frequency of a sound wave is pitch.

Answer;

Pitch

Pitch is the perceived frequency of a sound wave

Explanation;Pitch refers to how different frequencies of sound are perceived by human ear. It refers to how low or high a sound seems to a person.Frequency refers to the number of times per second a sound wave cycles from the highest to the lowest point.The pitch of the sound that is heard depends on the frequency of the sound waves. High-frequency sound waves produce high-pitched sounds, and low-frequency sound waves produce low-pitched sounds.

Answer is: value of q is 5·10⁻⁶m.chemical reaction: mg²⁺(aq) + co₃²⁻(aq) → mgco₃(s).c(mg²⁺) = 2.5·10⁻³ m; concentration of magnesium cations.c(co₃²⁻) = 2.00·10⁻³ m; concentration of carbonate anions.q = c(mg²⁺)  · c(co₃²⁻).q = 2.5·10⁻³ m  · 2.00·10⁻³ m.q = 5·10⁻⁶m.q = 0.000005 m.