Celebrated annually on October 23 from 6:02 a.m. to 6:02 p.m., Mole Day commemorates "Avogadro's Number": 6.02 x 10 23. This number--called a mole--is a basic measuring unit in chemistry. Mole Day ...

>Publishers: Danitees Printing and Publishing Ltd. For quite a long time now, there has been an urgent need for the improvement in the teaching and learning of CHEMISTRY at the Senior Secondary School ...