Kadir, Muhammad Ya’kub Aiyub, Universitas Syiah Kuala
Kanto, Dhini Annisa Rahmasari (Indonesia)
Karbeka, Martasiana (Indonesia)
Karbeka, Martasiana, Universitas Tribuana Kalabahi (Indonesia)
Karlani, Hagar, Tribuana Kalabahi University (Indonesia)
Karma, Taufiq, Universitas Abulyatama (Indonesia)
Khairiah, Khairiah, SMAN 1 Sukamakmur (Indonesia)
Khairunnisa, Yasmine (Indonesia)
Khotimah, Husnul, Universitas Islam Negeri Syarif Hidayatullah Jakarta (Indonesia)
Koly, Faryda Veronica Lamma (Indonesia)
Kurniawan, Ekin Dwi Arif, Chemistry Education Study Program, State University of Medan, Medan, Indonesia (Indonesia)
Kurniawati, Yenni (Indonesia)