completely burned, what weight of carbon dioxide and of water should be produced?

1096. Calculate the percentage composition and formulæ of the organic compounds which yielded the following analytical results ::

1097. 12435 gramme of an organic body having the

general formula CH2 is submitted to analysis. Find

2n

the weights of carbon dioxide and water which should be obtained.

1098. Find the percentage composition and formula of a substance from the following analytical results :—

(b). 0'2381 gramme of the substance yielded 0'4276

gramme ammonium chloride.

1099. A substance containing carbon, hydrogen and nitrogen, gave the following analytical results :-

(b). 0°1123 gramme of the substance yielded o°8021

gramme double chloride of platinum and ammonium. Find the percentage composition and formula of the substance.

1100. 0'2379 gramme of strychnine (C2H22NO2) is ana

21

lysed. Find the weights of carbon dioxide and water which should be obtained, and the volume of nitrogen measured at 10° C. and 757 m.m. pressure.

1101. In the analysis of a silver salt the following results were obtained by Frankland :—

(b). 0.36 gramme yielded on ignition o‘232 gramme silver. Find the percentage composition and formula of the salt.

1102. What weight of silver chloride should be obtained in the analysis of o7899 gramme of chloral?

1103. Why is it important to ascertain if possible the vapour density of an organic body?

1104. Describe the methods for ascertaining vapour density introduced by (a) Dumas, (b) Gay-Lussac, (c) Hofmann.

1105. Find the vapour density of an organic compound from the following data :—

1106. In a determination of the vapour density of

boric ethide, Frankland obtained the following results :-

Calculate the density of the vapour.

1107. Describe fully all the methods used for ascertaining the molecular formulæ of organic bodies.

1108. By whom and when was the synthesis of an organic compound first made? Describe fully the method employed.

1109. Give a historical sketch of the introduction of synthesis in organic chemistry.

1110. How may alcohol be built up from inorganic materials?

IIII. What are empirical, rational, constitutional, and graphic formula? Give examples.

1112. Explain the terms isomerism, metamerism, and polymerism, and illustrate your meaning by examples.

1113. Explain the use in organic chemistry of the process called fractional distillation.

1114. Give examples of positive and negative organic and inorganic radicals.

1115. Give constitutional and graphic formulæ for the following organic bodies: (a) alcohol, (b) marsh gas, (c) hydrocyanic acid, (d) ether, (e) oxalic acid, (ƒ) aldehyde, (g) acetic ether, (h) formic acid, (¿) urea, (j) succinic, acid, () acetic acid, () benzol, (m) benzoic acid.