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How many water molecules are in a block of ice containing 2.25 mol of water (H2O)?

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Moly42
2.25 moles of water ---> ? molecules of water

For this you have to use Avogadro's Number which is 6.022×10²³ molecules

[tex] \frac{2.25 moles}{} * \frac{6.022x10 x^{23} }{1 mol} = 1.35495x10 x^{24} [/tex]

Answer: [tex]13.5\times 10^{23}[/tex] molecules

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 Liters at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

Now 1 mole of [tex]H_2O[/tex] molecule contains = [tex]6.023\times 10^{23}[/tex] of molecules.

2.25 mole of [tex]H_2O[/tex] molecule contains= [tex]\frac{6.023\times 10^{23}}{1}\times 2.25=13.5\times 10^{23}[/tex] molecules.

[tex]13.5\times 10^{23}[/tex] molecules are there in 2.25 moles of water.

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