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
a).Define limiting reagent and excess reactants. Why they are called so?
b). 20g of marble containing 90% CaCO3 is allowed to react with 50g of concentrated acid containing 36.5% HCl by mass. Find the
i). limiting reactant
ii). number of mole of excess reagent left over unreacted
iii). mass of salt in gram
iv). volume of CO2 gas liberated at NTP