Yes, HN3 (hydrazoic acid) is a polar covalent molecule. The nitrogen and hydrogen atoms have different electronegativities, causing an uneven distribution of electron density and resulting in a polar molecule.
The valency of nitrogen in HN3 is +2. This is because there are three nitrogen atoms and one hydrogen atom in the compound, resulting in a total of +2 charge for nitrogen.
"HN3" is not a standard designation for gold plating. Gold plating typically uses terms like "microns" or "karats" to specify the thickness or purity of the gold layer. It's possible that "HN3" is a specific code used by a particular manufacturer, so it would be best to contact them directly for clarification.
HN3 can be 2 things:One compound is Tris(2-chloroethyl)amine is an organic compound with the formula N(CH2CH2Cl)3. It is Often abbreviated HN3 and known as nitrogen mustard gas.Another is Hydrazoic acid, also known as hydrogen azide or azoimide. It is a colorless, volatile, and extremely explosive liquid at room temperature. It is a compound of nitrogen and hydrogen, having chemical formula HN3.Both are covalent compounds, but Hydrazoic acid can form ions as well.Note that the amine is abbreviated as HN3 (without subscript) and the acid has the formula HN3 (with subscript).
The most acidic hydride of nitrogen is ammonia (NH3). This is because ammonia can donate a proton (H+) to a base, making it acidic. The other hydrides of nitrogen, such as hydrazine (N2H4) and hydrogen azide (HN3), are less acidic than ammonia.
This is a difficult question. What has to be addressed is the fact that in group 14, carbon is excellent at forming long chains, which contrasts to the heavier elements in the group. The ability drops to form chains decreases as you go down the group. With group 15 concatenation of nitrogen seem to limit at 3 in HN3. Phosphorus catenates in a comparable way to silicon. What is different? Well N2 is amazingly stable- its triple bond is approximately 3X the strength of a N-N single bond. In simple terms this means that whenever you try to form a long chain catenated nitrogen compound, nitrogen gas is just too stable and the molecule falls apart. HN3 is very unstable and is explosive.