Calculate the potassium ion concentration when 25.0 mL of 1.0 M KCl is added to 50.0 mL of 3.0M K2SO4

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

How have the greenhouse gasses increased from the year 2000 to 2018

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange