Chemical Process
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.

Directly proportional to
Inversely proportional to
Independent of
Proportional to the square of

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Chemical Process
Reverse osmosis is normally used for the

Purification of oxygen
Desalination of brackish water to produce potable (drinking) water
Separation of helium from natural gas
Separation of isotopes of uranium from gaseous uranium hexaflouride

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