This question is about salts. Ammonium nitrate solution is produced when ammonia gas reacts with
nitric acid.
6
Describe a method to investigate how the temperature changes when
different masses of ammonium nitrate are dissolved in water,
You do not need to write about safety precautions
[6 marks]

Ifound this on google “laws of chemical combination. it states that matter can neither be created nor destroyed. it stated that a given compound always contains exactly the same proportion of elements by weight.” i hope this you for what your looking for.

I'm pretty sure the answer is alcohol 

The answer is  d.  hydrogen 

Heat capacity = mcδtheat capacity = 2.676×10^3 j ..the heat capacity given is for 7.00 g of kcn,potassium cyanide which is equal to 0. mole of mole = mass  ÷ mr of kcn is 7  ÷ 65 =0.therefore: 0. of kcn liberates 2.676×10^3 j of heat1 mole   (2.676×10^3    ÷  0.107 )  × 1 =do the calculation to obtain 25009 j = 25kj