Question

What will be the formula of an oxide of iodine (atomic mass $=127$ ) which contains $25.4 \,g$ of iodine and $8\, g$ of oxygen?

• A. $I _2 O$
• B. $I _2 O _3$
• C. $I _2 O _5$
• D. $I _2 O _7$

Answer 1

Answer: (C)

$\because 25.4 \,g$ of $I_2$ combines with $8\, g$ of oxygen.
$\therefore 254\, gofI _2$ will combine with $80\, g$ of oxygen.