'Air consists of about 78% nitrogen, 1% argon & 21% this gas'
oxygen
GETTING SCIENTIFIC: Air consists of about 78% nitrogen, 1% argon & 21% this gas
Air consists of about 78% nitrogen, 1% argon & 21% this gas
Air consists of about 78% nitrogen, 1% argon & 21% this gas
GETTING SCIENTIFIC
oxygen
GETTING SCIENTIFIC