Răspuns:
Explicație:
a..
m = n . M m=masa subst. n=nr. moli M=masa molara
mHCl= 1 + 35,5= 36,5-------> 36,5g/moli
m= 2,36moli . 36,5g/moli = 86,14 gHCl
b.
MCaO= 40 + 16=56----> 56g/moli
m= 42moli. 56g/moli = 2352g CaO
c.
M CuSO4= 64 + 32 + 4.16=160----> 160g/moli
m= 0,45moli .160g/moli= 72g CuSO4
