What may be the reason for that fire accident​

Calculate the number of molecules present in 0.750 mol of mgo.

What is the molecular formula of ferrous nitrate and ferric nitrate

)in the deacon process for the manufacture of chlorine, hcl and o2 react to form cl2 and h2o. sufficient air (21 mole% o2, 79% n2) is fed to provide 35% excess oxygen, and the fractional conversion of hcl is 85%. calculate the mole fractions of the product stream components.