Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
산화제는 화학 반응에서 전자를 잃는 물질입니다.sanhwajeun hwahak ban-eungeseo jeonjaleul ilhneun muljilimnida.An oxidant is a substance that loses electrons in a chemical reaction.