Name: Avogadro's Law and Its Uses
Uploaded: 2019-07-19
Duration: 10 min 28 s
Description: Avogadro's law is an experimental gas law relating the volume of a gas to the amount of substance of gas present. Let us learn more through this video.

Question

Elements A and B gives three different compounds X, Y and Z with the following weight ratios:

Substance	X	Y	Z
Weight of A (g)	0.5831	0.0180	0.3600
Weight of B (g)	0.4200	0.0200	0.5200

Use these weight ratios to illustrate a law of chemical combination. State the law in words.

Accepted Answer

Dalton had postulated atomic theory among them third postulate is the law of multiple proportions, as per postulate the mass or mass fraction of one element combining with fixed mass of second element gives the whole ratio. In our case it is of three elements to be added to get a complete proportions, as per law of multiple proportions the weight of A and B are shown below,

Weight of A in gm $= X + Y + Z = 0.5831 + 0.0180 + 0.3600 = 0.961$

In terms of whole fraction $= 0.6 + 0 + 0.4 = 1.00$

Weight of B in gm $= X + Y + Z = 0.4200 + 0.0200 + 0.5200 = 0.96$

Thus, it follows law of multiple proportions. The law of multiple proportions states that if two elements form more than one compound, then the ratios of the masses of the second element which combine with a fixed mass of the first element will always be ratios of small whole numbers.

Elements A and B gives three different compounds X, Y and Z with the following weight ratios:

Substance X Y Z

Weight of A (g) 0.5831 0.0180 0.3600

Weight of B (g) 0.4200 0.0200 0.5200

Use these weight ratios to illustrate a law of chemical combination. State the law in words.

Chapter-Wise 3D Chemistry Videos from Dr. H.C. Srivastava ISC Nootan Chemistry Volume 1 for Class XI

Avogadro's Law and Its Uses

Determination of Relative Molecular Masses

Chemical Equivalent

Learn and Prepare for any exam you want !

Elements A and B gives three different compounds X, Y and Z with the following weight ratios: Substance X Y Z Weight of A (g) 0.5831 0.0180 0.3600 Weight of B (g) 0.4200 0.0200 0.5200 Use these weight ratios to illustrate a law of chemical combination. State the law in words.