REALLY NEED HELP! Acetic acid (CH3COOH) is one of the simplest carboxylic acids. It is an important chemical reagent and industria chemical. Vinegar is dilute acetic acid, often produced by fermentation. The following is a reversible reaction: CH3COOH + H+ + CH3COO- Write the set up you would use to calculate the Ka of this reaction.

Calculate the hydrogen ion concentration [H+] of a 0.1 M solution of acetic acid given that the dissociation constant of acetic acid is Ka = 1.8 x10-5. Work must be shown to earn credit.​

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.