Question

Exercitiile 3 si 4 va rog!!!! Dau coroana si 100 de puncte!!!!! ​

Answer 1

Răspuns:

se aplica relatia     niu=m/M

a. M,CaO=56g/mol         niu=5,6/56mol=0,1mol

b. M,H2SO4=98g/mol    niu=980/98mol=10mol

c.M,H2O=18g/mol          niu= 3600/18mol=200mol

d.M,Al(OH)3=78g/mol     niu=156/78mol=2mol

SE aplica relatia       m= niuxM

a. M,HNO3=63g/mol      m=6x63g=378g

b. M,MgO=40g/mol        m= 3500x40g=140000g

c. M,CO2=44g/mol          m= 0,2x44g= 8,8g

d .M,NaOH=40g/mol       m= 1x40g=40g

Explicație: