Is nitrogen and cobalt and carbon a mixture or pure substance

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-

Which of the following electromagnetic waves can create ions?

Why do lunar and solar eclipse not happen every month