How can you illustrate the law of multiple proportions by using oxides of metals containing 78.7% and 64.5% of the metal?

CO and CO_2 can be considered, as an example for law of multiple proportion. Illustrate the same law by using the oxides of a metal containing 78.7% and 64.5% of the metal.

How can you charge a metal sphere positively without touching it?

Illustrate how copper metal can give different products on reaction with 'HNO3'

A compound contains 28% of nitrogen and 72% of a metal by weight. 3 atoms of the metal combine with 2 atoms of nitrogen. Find the atomic weight of the metal. (N = 14)

How can you determine the atomic mass of an unknown metal if you know its density and the dimension of its unit cell? Explain?

Consider the following metallurgical processes in 1. Heating impure metal with CO and distilling the resulting volatile carbonyl boiling point 43^@C and finally decomposing at 150^@ to 200^@C to get the pure metal. II. Heating the sulphide ore in air until a part is converted to oxide and then further heating in the absence of air to let the oxide react with unchanged sulphide. III. Electrolysing the molten electrolyte containing approximately equal amounts of the metal chloride and CaCl_2 to obtain the metal. The processes used for obtaining sodium, nickel and copper are respectively

How many Galvanic cells can be made by using the metals Ag, Cu, Zn and Mg. When Galvanic cells are made using the metals given, what will be the nature of reactions in each cell? (Reactivity: Mg gt Zn gt Cu gt Ag).

You know that metals can be separated from molten compounds of metals by electrolysis. Find out how metals like Na, Ca and Mg are extracted