Question

Ce cantitate de azotat de magneziu cuprinde 4,8g oxigen ?
Ma poate ajuta cineva ?

Answer 1

formula chimica Mg(NO3)2

masa molara M= (24gMg + 2x14gN+6x16gO)/mol= 148g/mol

148g azotat contine.......96gO

X...............................................4,8g

x= 4,8x148/96 gO=.....................calculeaza !!!!!

sau 1mol azotat. contine........96gO

X...........................................4,8g

CALCULEAZA X,moli azotat !!!!