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Calculate the number of atoms in 39.4 g gold. Molar mass of gold is 197g/mol:
How many are there protons in the nucleus of carbon -
Normal blood pressure of man is
The basic unit of biosystematics is
What was the active medium used in the first working laser ever constructed?
Which of the following is an ore of iron?
Calorific values are in which of the following actions?
How many axial bones in human body
Normal Human blood pressure is
The best colour(s) for a sun umbrella will be
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