The density of water is 1.00 g/ml at 4°c. how many water molecules are present in 2.36 ml of water at this temperature

The density of water is 1.00 g/ml at 4°C which means mass 1 ml of water 1 g, so, mass of 2.36 ml 1/2.36 g= 0.423 g.

Molecular mass of water is 18 g. As per mole concept, 1 mole of water i.e, 18 g water contains 6.023 X molecules. Therefore, 0.423 g water contains =0.141 X number of water molecules= 1.41 X number of water molecules.

answer: they produce more slow than unicellular organisms.