A sample of magnesium is partially oxidised to magnesia. 3 grams of such sample is treated with excess dilute sulphuric acid and the hydrogen collected measures 1.12 L at STP. What is the weight ratio of metal and metal oxide in the sample?

A sample of magnesium is partially oxidised to magnesia. 3 grams of su

1.	A sample of magnesium is partially oxidised to magnesia. 3 grams of such sample is treated with excess dilute sulphuric acid and the hydrogen collected measures 1.12 L at STP. What is the weight ratio of metal and metal oxide in the sample?
Answer» <html><body><p></p>Solution :Reaction of sulphuric <a href="https://interviewquestions.tuteehub.com/tag/acid-847491" style="font-weight:bold;" target="_blank" title="Click to know more about ACID">ACID</a> with <a href="https://interviewquestions.tuteehub.com/tag/components-926700" style="font-weight:bold;" target="_blank" title="Click to know more about COMPONENTS">COMPONENTS</a> is given as <br/> `<a href="https://interviewquestions.tuteehub.com/tag/mg-1095425" style="font-weight:bold;" target="_blank" title="Click to know more about MG">MG</a>+H_(2)SO_(4) to MgSO_(4)+H_(2)` <br/> `MgO+H_(2)SO_(4) to MgSO_(4)+H_(2)O` <br/> 1 mole of `H_(2)=` 1 mole of Mg <br/> 22.4 of `H_(2)` at STP=24 g of Mg <br/> 1.12 L of `H_(2)` at =STP=? <br/> Weight of magnesium in given sample= <br/> `(1.12)/(22.4) <a href="https://interviewquestions.tuteehub.com/tag/xx-747671" style="font-weight:bold;" target="_blank" title="Click to know more about XX">XX</a> 24=1.2" grams"` <br/> Weight of MgO in given sample `=3-1.2=1.8` grams <br/> Weight ratio of Mg and MgO =1.2 : 1.8=2:3</body></html>