Question

compound 1 contains 15.0g of hydrogen and 120.0g oxygen. What is the percent compound of each element?

Answer 1

Note down the formula below

`\boxed{\sf Mass\%\;of\; element=(Mass\:of\:the\: element)/(Mass\;of\:the\: compound)* 100}`

Mass of the compound

`\\ \sf\longmapsto 15+120=135g`

Mass % of Hydrogen:-

`\\ \sf\longmapsto (15)/(135)* 100`

`\\ \sf\longmapsto (1)/(9)* 100`

`\\ \sf\longmapsto 11.1\%`

Mass % of Oxygen:-

`\\ \sf\longmapsto (120)/(135)* 100`

`\\ \sf\longmapsto (8)/(9)* 100`

`\\ \sf\longmapsto 88.9\%`