How many mL of a 4.00 M NH4Cl solution must be added to 250 mL of a 0.250 M NH3 solution to make a buffer with pH

In the lab, ammonia was mixed with water to form ammonium hydroxide. what is/are the reactant(s)? o water and ammonia o ammonia o ammonium hydroxide need

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

The concentration of ionic substances is important for the heart to beat. your heart responds to electrical impulses that travel through heart cells that are made up mostly of water. which properties of ionic compounds are important to support this function? solubility in water conductivity crystalline melting point