Question

HELP, CHIMIE, URGENT!​

Answer 1

Răspuns:

MMgO =24+16=40g/mol

n=m/M

m=n×M=8×40=320g

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

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

m=n×M=2×44=88g

MAl2O3 =2×27+3×16=102g/mol

m=n×M=3×102=306g