Adding helium to a balloon increased its volume from 790.8 mL to 1.860 L. If the final number of moles of helium in the balloon is 15.3 mol, what was the initial number of moles of helium in the balloon

Match the acid base pairs by arranging the acid name with the conjugate base formula. hydrogen carbonate hydrogen phosphate carbonic acid read water sulfuric acid phosphoric acid a. co32- b. hso4- c. hco3- d. po43- e. h2po4- f. oh-

Why is silver chloride is an ionic compound

Name the element in group 17, period 2. (periodic table)