To solve the question "Twice the vapour density gives", we need to understand the concept of vapour density and its relation to molar mass. 1. Understanding Vapour Density: Vapour density (VD) is defined as the
Molecular beam mass spectrometry studies of the gas-phase chemistry occurring during microwave plasma assisted chemical vapour deposition of diamondGas-phase chemistryMicrowave plasmaMolecular beam mass spectrometryA molecular beam mass spectrometer has been used for in-situ studies of the gas-phase ...
Vapour density can be defined as the density of vapour in relation to the density of vapour of hydrogen. On the other hand, we can describe it as the mass of a certain volume of a substance divided by the mass of hydrogen with the same volume. Therefore, there can be several relationshi...
Water vapour diffusion through a porous material. (a) Schematic of water vapour diffusion mass flux\(j_{\textrm{m}}\)in a porous barrier of thicknessLseparating air-filled compartments A and B with water vapour pressures\(p_{\textrm{wA}} > p_{\textrm{wB}}\), relative humidities RH\...
Here, we report a straightforward, vapour-phase-transport strategy for the transformation of IWW zeolite with low-density silica layers connected by labile Ge-rich units into material with new topology. In situ XRD and XANES studies on the mechanism of IWW rearrangement reveal an unusual structural...
8,9)). In addition, the derived mean molecular weight suggests an atmosphere still containing some hydrogen. The observations were recorded with the Hubble Space Telescope/Wide Field Camera 3 and analysed with our dedicated, publicly available, algorithms5,9. Although the suitability of M dwarfs ...
The latent heat requirements associated with this vapour formation must be provided by sensible heat conduction from the bulk liquid. We can write the energy balance at the interface as:(3)ρvhlvV˙sp=Aspq″, where ρv and hlv represent the vapour density and latent heat of evaporation, ...
Molecular PhysicsGillan, MJ (1983) Liquid-vapour equilibrium in the restricted primitive model for ionic liquids. Mol Phys 49: pp. 421-442Gillan, M.J. (1983) Liquid-vapour equilibrium in the restricted primitive model for ionic liquids, Molec. Phys . 49 , 421–442....
Figure 2: Number density and composition for liquid-cooled and vapour-deposited films formed under several conditions. Data for liquid-cooled films are shown in a while data for vapour-deposited films are shown in b. The dotted, dashed and solid lines represent films formed with t=1.4 × 10...
The initial assignment of UH+ molecular ions as from uranium hydride, which has the formal stoichiometry of UH3, is substantiated using existing time-of-flight (ToF) SIMS and density functional theory (DFT) evidence9. The DFT suggests that molecular UHx cations where x > 1 suffer from ...