CREATE TABLE table_name_21 (percent_of_mass VARCHAR2, molweight__daltons_ VARCHAR2)

what is the percent of mass when the mol.weight (daltons) is 1e11?
SELECT percent_of_mass FROM table_name_21 WHERE molweight__daltons_ = "1e11"
SELECT "percent_of_mass" FROM "table_name_21" WHERE "1e11" = "molweight__daltons_"