Question

H2SO+Al=

NaOH+H3PO4=

K+O2=

Answer 1

$3H_{2}SO_{4}+2Al=Al_{2}(SO_{4})_{3}+3H_{2}$

$NaOH+H_{3}PO_{4}=NaH_{2}PO_{4}+H_{2}O$

$K+O_{2}=KO_{2}$