An inorganic compound contained 24.75% (w/w)potassium and 34.75% (w/w

1.	An inorganic compound contained 24.75% (w/w)potassium and 34.75% (w/w) manganeseand some other common element. Give theempirical formula of the compound (K 39u,Mn = 59u)
Answer» let the mass of compound be 100gnow % potassium = 24.75 , so mass = 24.75 Then moles of potassium = 24.75/39 = 0.63 and similarly moles of manganese = 34.75/59 = 0.58 so, Moles of K and Mn are almost same . => emperical formula will be KMnX where X => other common elements.

An inorganic compound contained 24.75% (w/w)potassium and 34.75% (w/w) manganeseand some other common element. Give theempirical formula of the compound (K 39u,Mn = 59u)

Answer»

let the mass of compound be 100gnow % potassium = 24.75 , so mass = 24.75 Then moles of potassium = 24.75/39 = 0.63

and similarly moles of manganese = 34.75/59 = 0.58

so, Moles of K and Mn are almost same .

=> emperical formula will be KMnX

where X => other common elements.