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1 g of dry green algae absorbs 4.7 times...

1 g of dry green algae absorbs `4.7 times 10^(-3)` mole of `CO_(2)` per hour by photosynthesis. If the fixed carbon atoms were all stored after photosynthesis as starch `(C_(6)H_(10) O_(5))_(n)` how long would it take for the algae to double their own weight assuming photosynthesis takes place at a constant rate ?

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