YOU SAID:

chemistry is the worst school subject

INTO JAPANESE

化学は最悪の教科だ

BACK INTO ENGLISH

chemistry is the worst subject

INTO JAPANESE

化学は一番苦手な科目です

BACK INTO ENGLISH

Chemistry is my worst subject

INTO JAPANESE

化学は私の苦手な科目です

BACK INTO ENGLISH

Chemistry is my weakest subject

INTO JAPANESE

化学は私の一番苦手な科目です

BACK INTO ENGLISH

Chemistry is my weakest subject