A divalent metal oxide contains 60% of metal. What is atomic weight of metal?
wt of metal= 60 g
wt of oxygen= (100-60) g= 40 g
Eq. wt. of metal = wt. of metal/ wt of oxygen* 8
= 12
As metal is divalent, At. wt= Eq. wt* valency= 12*2 = 24
Define stoichiometry. What is the etymological meaning of stoichiometry in Greek? And what is stochiometric compounds?
Stoichiometry is defined as the branch of chemistry that deals with the mass-volume relationship of elements in a chemical change.
The etymological meaning of stoichiometry is measurement of elements. In Greek, stoicheion means element and metron means to measure. Stoichiometry = Stoicheion + Metron
Those substances that obey the laws of Stoichiometry are called stoichiometric compounds.