English Vocabulary Flash Cards - Chemical Formulas @ englishpdf.com and englishteststore.com File 163 NaCa2(Al5Si5O20) · 6H2O thomsonite NaCl sodium chloride NaH sodium hydride NaHCOO sodium formate NaHCO3 sodium bicarbonate NaI sodium iodide NaNH2C6H4SO3 sodium sulfanilate NaNO3 sodium nitrate