What is the shape of an HNO molecule
It appears there might be some confusion because "HNO" does not correspond to a common molecular formula. Typically, when referring to an HNO molecule in the context of chemistry, this might be a shorthand or a misrepresentation of either:
1. Nitroxyl (HNO), which is the chemical formula for the nitroxyl radical, an unstable molecule in a singlet state with a linear shape. Nitroxyl consists of a nitrogen atom single-bonded to a hydrogen atom and double-bonded to an oxygen atom. However, it's important to note that HNO is not well-characterized because it dimerizes rapidly to hyponitrous acid (H2N2O2).
2. Nitrous acid (HNO2), which is a weak and unstable acid at room temperature that exists only in solution or in the form of nitrite salts. The molecule of nitrous acid has a bent V-shape structure similar to that of water, with the nitrogen atom at the apex of the V and the oxygen atoms at the tips.
If you are specifically referring to HNO as a chemical entity, then confirmation is needed as to whether you mean "Nitroxyl radical" or some other compound described with an imprecise formula. To clarify and provide accurate information, please provide more context or the correct molecular formula.