If the initial concentration of ABAB is 0.280 MM , and the reaction mixture initially contains no products, what are the concentrations of AA and BB after 75 s s ?

Idon’t understand this page, can someone ?

If i make a solution by adding 83grams of sodium hydroxide to 750ml i’d water what is the molarity of sodium hydroxide

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon