Its 20.17 to find it you can look on your periodic table and look for neon which is Ne and if you look at the bottom or at the key it should show you were atomic mass would be â¦ found. Most of the time its found on the bottom under the name.
High Resilience foam, or HR foam, is open-cell, flexible polyurethane foam that has a less uniform (more random) cell structure that helps add support, comfort, and resilience or bounce.hile HR foams are a significantly smaller part of what Bergad offers, we do offer foams in a wide range of physical characteristics, with: 1  Densities from 2 to over 30 pounds per cubic foot, 2  Firmnesses (25% IFD) from 15 to over 300 pounds,
Spray Foam is categorized into two types, open-cell or closed-cellâ. Open cell is lightweight foam that is flexible, and an excellent air barrier. Open cell foams most commonly range from .5 lb to .7lb densities. Closed cell foam is higher density foam, and a moisture barrier. Most closed cell foam used for insulation range from 1.7 lb to 2 lb. Closed cell foam can go up to 3 lb density which is often used in exterior roof applications (like the Superdome). The main differences between open and closed cell foam are moisture permeability, R-Value, and flexibility. Closed cell foam is a moisture vapor barrier. What this means is that it will not allow moisture to pass through the foam. Open cell foam is not a moisture vapor barrier, and will allow moisture to pass.