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
12g of carbon react with 4g of hydrogen to produce 16g of methane. Which chemical law do these data illustrate? State the law.
C + 2H2 → CH4
Total weight of reactant = 16g
Total weight of product = 16g
Total weight of reactant = total weight of product
So these data show the law of conservation of mass.
Statement:
Total sum of mass and energy of system remains constant, but they can be interconverted.