Question

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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Answer 1

2,47 *
`10^(24)` (molecules)

Step-by-step explanation:

Avogadro's number is a very important relationship: 1 mole = 6,02 *
`10^(23)` atoms, molecules, protons, etc.

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

4,1 mol * 6,02 *
`10^(23)` ≈ 24,7 *
`10^(23)` = 2,47 *
`10^(24)` (molecules)

Therefore the third answer is correct