El nitrógeno esta formado en la naturaleza por dos isotopos, uno con masa atómica de U con una abundancia del %, y el otro con masa atómica de U con abundancia isotópica del% .¿ Cual es la masa atómica del isotopo? *

Two things that biomedical has invented or innvated

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as