Answer:
The number of molecules is 1.4140*10^24 molecules
Explanation:
To know the number of molecules, we need to determine how many moles of water we have, water has molar mass of 18.015g/mol
This means that one mole of water molecules has a mass of 18.015g.
42.3g * 1 mole H2O/18.015g
= 2.3480 moles H2O
We are using avogadros number to find the number of molecules of water
2.3480 H2O * 6.022*10^ 23moles/ 1mole of H2O
That's 2.3480 multiplied by 6.022*10^23 divided by 1 mole of H2O
Number of molecules = 1.4140 *10^24 molecules
The number of molecules is [tex]1.4140\times 10^24[/tex] molecules
here we need to find out how many moles of water we have, water has molar mass of 18.015g/mol
Now
[tex]42.3g \times 1 mole H_2O\div 18.015g[/tex]
= 2.3480 moles [tex]H_2O[/tex]
Here we used avogadros number to find the number of molecules of water
[tex]2.3480 H_2O \times 6.022*10^ 2\ 3moles\div 1mole of H2O[/tex]
[tex]2.3480 \times 6.022\times 10^23 \div 1 mole of H_2O[/tex]
=[tex]1.4140 \times 10^24[/tex] molecules
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