The neck of a glass funnel is covered with wet filter paper why

The neck of a glass funnel is covered with wet filter paper in sublimation process because it will slow down the rising of the warm gases and it will prevents them from escape.

The neck of a glass funnel is covered with wet filter paper in sublimation process because it will slow down the rising of the warm gases and it will prevents them from escape.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.