Question

Calculate the percentage of

( l ) magnesium in magnesium oxide

( 'll ) oxygen in calcium carbonate

Answer 1

answer in the picture......

Answer 2

$\huge\boxed{Mg - in }\huge\boxed{MgO}$

$\huge\boxed{O -in}\huge\boxed{ O_2}$

$\huge\mathfrak\red{Thank you }$

$\large\textit\green{REFER ATTACEMENT }$