Sodium chloride is readily soluble in water and insoluble or only slightly soluble in most other liquids. It forms small, transparent, colorless to white cubic crystals. Sodium chloride is odorless but has a characteristic taste. It is an ionic compound, being made up of equal numbers of positively charged sodium and negatively charged chloride ions<span>. When it is melted or dissolved in water the ions can move about freely, so that dissolved or molten sodium chloride is a conductor of electricity; it can be decomposed into sodium and chlorine by passing an electrical current through it </span>
Answer:
a. Alkynes (CnH2n+2) are saturated hydrocarbons.
The measured bond<span> angles of these compounds (H</span>2O 104.5º & NH3<span> 107.3º) show that they are closer to being tetrahedral than trigonal or linear. Of course, it is the configuration of atoms (not electrons) that defines the the </span>shape of a molecule<span>, and in this sense ammonia is said to be pyramidal (not tetrahedral).</span>
In a neutral compound sum of charges should be equal 0,
+3*2-2*3=0,
so ratio of ions n(Al³)⁺:n(S²⁻)=2:3
