Care grame contin 4 moli H2O???

Cate grame contin 5 moli CH4? URGEEEEEENNNTTTTTT


Răspuns :

MH2O = 18g/mol   , n = m/M => m = n*M = 4*18 = Calculeaza !

MCH4 = 16g/mol  ,  n= m/M => m = n*M = 5*16 = Calculeaza !

n - nr moli
m- masa , g
M - masa molara, g/mol