Question

An unknown element forms an oxide. What will be the equivalent weight of the element if the oxygen content is $20\%$ by weight?

• A. 16
• B. 32
• C. 8
• D. 64

Answer 1

Answer: (B)

32

Answer 2

Given that, oxygen contents in element oxide is $20\%$ by weight.
Hence, element contents in element oxide is $80\%$ by weight.
Then, equivalent weight of unknown element
$=\frac{80}{20}\times 8$
$\therefore$ Equivalent weight of unknown element $=32$