IX POPULAR CHEMISTRY. 69 



2NH 4 C1 : CaO : : 3 : a?. 

 107 : 56 : : 3 : cc. 



x = 1.57 grams. 



S. How much N 2 Ocanbe made from 1 gram of am- 

 monium nitrate ? 



The reaction is 



NH 4 NO 3 = 2H 2 O + N 2 0. 

 Hence, NH 4 NO 3 : N S O : : 1 : x. 



80 . 44 : : 1 : x. 

 x = .55 gram. 



.9. How much nitric acid can be formed from 5O kilos 

 of sodium nitrate (NaNO*)? 



The reaction is 



Hence, NaNO 3 : HNO 3 : : 50 : x. 



85 : 63 : : 50 : x. 

 x = 37 + , kilograms. 



1 O. What causes flesh to decompose so much more easily 

 than wood ? 



It is partly owing to the greater complexity of its molecule, 

 and partly to the presence of the N, which is very unstable in 

 its compounds. 



11. If a tuft of hair be heated wi a lest tube, the liquid 

 formed ivill turn red litmus-paper blue. Explain. 



Ammonia is formed by the decomposition of the hair, and 

 this acting on the red litmus-paper, turns it blue. 



12. Why should care be used in opening a bottle of 

 strong H 3 N in a warm room? 



The space above the liquid is filled with ammonia gas, 

 which had been dissolved in the water at a low temperature. 

 Its expansive force is greatly increased when the temperature 

 is raised. When the stopper is removed, therefore, a concussion 

 may result. 



