Question

calculate the mass of the following 2.5 moles of H2o molecules?​

Answer 1

The amount of oxygen in 2.5 moles of water is 40 grams.

The molecular formula of water is H₂O. 1 mole of water contains 1 mole of oxygen.

Answer 2

Explanation:

You can calculate the number of molecules from moles by using Avogadro's constant, 6.02×1023molecules/mol.

For every 1 mol, there are 6.02×1023 molecules.

Simply multiply

2.5 mol×6.02×10231 mol=1.5×1024 molecules