IN CHEMISTRY. *>I 



Following the same reasoning as in the last problem, we 

 have 



H = 10 grs. ; hence the HO = 9 times 10 grs. = 90 grs. 

 90 grs. (HO) 10 grs. (H) = 80 grs. (O). 



}6. What weight of N is there in 10 Ibs. of NH^.HO f 



N : NH 8 .HO : : x : 10 Ibs. 

 14 : 26 : : x : 10 Ibs. 

 x = 5 6 /i Ibs. (N). 



37. How much KO. ClO b would be required to evolve suffi- 

 cient O to burn the H produced by the decomposition of ?, Ibs. 

 of HO? 



f of HO is O ; hence i Ibs. of HO will produce, when de- 

 composed, i$ Ibs. O. The problem is, then, how much 

 KO.C1O, would be required to furnish i$ Ibs. O ? 



60 : KO.C10 5 : 1.77 Ibs. : x. 



48 : 122.5 : : 1.77 Ibs. : x. 



a; = 4.51 Ibs. (KO.C1O 6 ). 



(If the common fractions are used in solving this problem, 

 the answer is 4!! Ibs.) 



38. How much H must be burned to produce a ton of 

 water? 



H : HO : * : 2000 Ibs. 

 1:9 : : x : 2000 Ibs. 

 a; = 2222/ Ibs. (H). 



39. How much S is there in a Ib. of SO 3 f 



S : S0 a : : x : 1 Ib. 



16 : 32 : : x : 1 Ib. 



x = Va H>- (S). 



40. Find how much "soda" is formed from 500 Ibs. of 

 salt. 



41. Find the amount of Glauber salt produced in the first 

 step, with the charge just named. 



42. Find the amount of HCl produced. 



43. Find how much sulphuret of sodium is formed in the 

 second step. 



