How many molecules in 4.10 mol H2O? 6.02×10^23

1.4×10^23

2.47×10^24

1.15×10^-23

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2,47 * (molecules)

Explanation:

Avogadro's number is a very important relationship: 1 mole = 6,02 * atoms, molecules, protons, etc.

To convert from moles to molecules, multiply the molar amount by Avogadro's number.

4,1 mol * 6,02 *  ≈ 24,7 * = 2,47 * (molecules)

Therefore the third answer is correct

- decrease the number of plants and animals living in the water.