Answer to Question #238429 in Inorganic Chemistry for Donnia

Question

When 10.0 grams of A was heated, 4.40 grams of B was given off, leaving 5.60 grams of E. The same quantity of B can also be prepared by combination of 1.2 grams of C and 3.2 grams of D. C decomposes to form a new substance while D was found to contain two chemical elements. The E can be electrolyzed after melting to yield 4.0 grams of F and 1.6 grams of G, neither of which can be further decomposed by ordinary chemical means. E combines with water to give 1.3 grams of J per gram of E and gas L. The gas L has exactly the same properties as the product obtained when carbon is burned in an excess of oxygen.

Answer 1

Percentage of B$= \frac{4.40}{10.0}×100=40$ %

Percentage of E$= \frac{5.60}{10.0}×100=56$ %

It is given that; A is a solid white substance and on strong heating in absence of air it will undergoes decomposition to give another substance B and a gas C.

Since, it is given that the substance A is a solid which undergoes decomposition, it will be definitely a compound. This is because of the fact that, it is only a compound can undergo decomposition to produce simpler substance.

It is also given that; the gas C possess the same properties as that of the product which is produced during the burning of carbon in excess air. It is the carbon dioxide gas which is formed during this burning process. Since, carbon dioxide is a compound, the gas C will be also a compound.

It is only given that; the B is a white substance. This observation is not enough to determine the substance is an element or a compound. It can be either an element or a compound.

Ammonia

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