Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_21 (percent_of_mass VARCHAR, molweight__daltons_ VARCHAR)

### Question ###
what is the percent of mass when the mol.weight (daltons) is 1e11?

### Accurate SQL ###

SELECT percent_of_mass FROM table_name_21 WHERE molweight__daltons_ = "1e11"