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What a molecule is, and the difference between molecules and compounds?
A molecule is made up of two or more atoms combined chemically. The atoms can be of the same element, as in oxygen gas (O2), or two or more different elements combined, as in water (H20). By contrast, a compound is made up of two or more different elements combined.
Another way to see the distinction is that molecules represent a larger category in the classification of matter. A molecule can be any combination of two or more atoms. By contrast, a compound must be composed of at least two different elements; therefore, compounds are a subset of molecules.
A 12.8 Kb circular plasmid is digested with the following restriction enzymes, resulting in the pattern of bands indicated. BamHI 12.8kb HindIII 9.3kb + 3.5kb B
We will first give a brief description of the qocial and economic changes of this period so that developments in science can be seen in the proper perspective. Already, by the
Define Calculi and casts - abnormal constituent of urine An abnormal concretion in the body usually formed of mineral salts and found in the gall bladder, kidney or urinary bla
What causes winds? An uneven heating of the Earth's surface causes winds. On being heated, air becomes lighter and rises up. As a result, a region of low pressure is created. Th
First Aid Procedures : Your Counsellor will explain the first aid procedures through a demonstration session. Carefully observe ali the steps. Try to relate the contents of the f
Explain the Microscopical examination of Urine By microscopical examination, the pus cells, RBC and cast cells are found if the infection is present. Microscopical examination
discuss the importance of society and culture to existence of man .
How has the earth changed since it was formed? Ans) The earth has changed particularly since it was formed. Earth was a ball of rock that was strike and changed by loads of imp
Which is the largest reef? This is the Great Barrier Reef off the northeast corner of Australia.
how does it get into the earth?
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