Question

HELP, CHIMIE, URGENT!​

Answer 1

Răspuns:

1) MMgO=24+16=40g/mol

MHCl=1+35,5=36,5g/mol

n=m/M

m=40×8=320g

40g.......2×36,5g

MgO + 2HCl => MgCl2 + H2O

320g......xg

x=320×2×36,5/40=calculează

2) MH2SO4 =2×1+32+4×16=98g/mol

1mol=98g

MCO2=12+2×16=44g/mol

1molCO2......44g

2moli.........yg

yg2×44/1=88g

MAl2O3 =2×27+3×16=102g/mol

1molAl2O3.........102g

3moli...................zg

z=3×102/1=306g