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Peremiter of triangle 87cm 23 cm 29cm???
What is the difference between oilfield and oil refineries???
What is atomic mass unit???
Rayon is different from synthetic fibres because
(a) it has a silk-like appearance.
(b) it is obtained from wood pulp.
(c) its fibres can also be woven like those of natural fibres.
Write the chemical formula of the following.
(a) Magnesium chloride
(b) Calcium oxide
(c) Copper nitrate
(d) Aluminium chloride
(e) Calcium carbonate
If one mole of carbon atoms weighs 12grams, what is the mass (in grams) of 1 atom of carbon?