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DAU 30 DE PUNCTE SI COROANA !!!!!
Pt. substanta denumita Ca(OH)₂ claculati nr de moli continuti in 150g de Ca(OH)₂


Răspuns :

MCa(OH)₂= ACa+2(AO+AH)=40+2(16+1)=74g/mol

m=150g

n=m/M=150/74=2,027 moli Ca(OH)₂

Ca(OH)₂ se numeste hidroxid de calciu sau var stins
n = m/masa molara
masa molara = 40+2*(16+1) = 74 g/mol
n = 150/74 = 2.027 moli Ca(OH)2