A buffer that contains 0.44 M of acid, HY and 0.55 M of its conjugate base Y-, has a pH of 3.25. What is the pH after 0.048 mol of Ba(OH)2 are added to 0.66 L of the solution

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

Ibeg i need 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?