CuO +H Br= Fe 2O3 + HNO= NaOH+H2SO4= Ba(OH)2+H3PO4=

Question

CuO +H Br=
Fe 2O3 + HNO=
NaOH+H2SO4=
Ba(OH)2+H3PO4=

Answer 1

CuO+ 2HBr= CuBr2+ H2O
Fe2O3+ 6HNO3= 2Fe(NO3)3+ 3H2O
2NaOH+ H2SO4= Na2SO4+ 2H2O