This form of assessment is often referred to as evaluation (see section below on Assessment versus Evaluation). Learner assessment represents a particular type of educational assessment normally conducted by teachers and designed to serve several related purpose (Brissenden and Slater, n.d.).
the formula of borax is Na2B4O7Â·10H2O or alternatively to make the structure more explicit, Na2[B4O5(OH)4]Â·8H2O. It is usually called sodium tetraborate decahydrate or diso â¦ dium tetraborate decahydrate. Liam Frayne.
Borax is a name for several different but similar chemical compounds, of which probably the commonest is sodium decahydrate or sodium borate. They all contain sodium and boron. Borax is toxic enough to kill ants, fleas and cockroaches and other unwanted insect life. Its effects upon the environment are not yet well documented but it can be toxic to aquatic life if too concentrated. It is regarded by the Australian government as a low threat to the environment but a moderate threat to health.