On the basis of the information above, a buffer with a pH = 9 can best be made by using A pure NaH2PO4

B H3PO4 + H2PO4–

C H2PO4– + PO42–

D H2PO4– + HPO42–

E HPO42– + PO43

The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %

From the choices provided below, list the reagent(s) in order that will react with cyclopentanone to form the compound shown below.