How many electrons does benzene have?
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Why is the percentage of oxygen today the same as it was thousands years ago, even though the whole world inhals it?
Explain the Molecule?
What is chemistry ?
What is Poling ?
When a glass rod is heated gradually and suddenly dipped in cold water, it cracks. What is the reason????????? When a cool glass rod is suudenly heatd, it cracks. Why?????????
When the heat rays from the sun area focused on a piece of black cloth by means of a lens, the cloth catches fire. Why ?
What is a cell?
On the cold morning, a gardener touches the iron blade of his spade with one hand and its wooden handle with other hand. Why does he feel the iron blade to be colder than the wooden handle ?
Which is the hardest substances know ?
Why does milk turn sour ?
Differentiate between organic and inorganic chemistry?
Hom many total number of inner transition elements are?