Question

Calaculati numarul de moli existenti: 4gCo ; 25g CACO3 ; 320g SO3 ; 63g HNO3 ; 400g H3; 585gNACl; 19,6g H2 So4

Answer 1

MCO=28g/mol

n=m/M=4/28=0.142 moli CO

MCaCO3=100g/mol

n=m/M=25/100=0.25 moli CaCO3

MSO3=80g/mol]

n=m/M=320/80=4 moli SO3

MHNO3=63g/mol

n=m/M=63/63= 1 mol HNO3

MH3=3g/mol ??

n=m/M=400/3=133.33 moli ?> ai gresit substanta..

MNaCl=58.5g/mol

n=m/M=585/58.5=10 moli NaCl

MH2SO4=98g/mol

n=m/M=19.6/98=0.2 moli H2SO4