Answer:
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Explanation:
To go from the mass of water to molecules of water, we have to do two things:
Convert mass of H2O to moles of H2O using the molar mass of H2O as a conversion factor
Convert moles of H2O to molecules of H2O using Avogadro's number (6.02×1023) as a conversion factor
Step 1:
Before we start, I should note that the molar mass of H2O is 18.01gmol.
We can go from mass to moles using dimensional analysis. The key to dimensional analysis is understanding that the units that you don't need any more cancel out, leaving the units that are desired:
36g×1mol18.01g =2.00mol
Step 2:
We'll use the following relationship:
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Using the moles of H2O that were just obtained, we can use Avogrado's number to perform dimensional analysis to cancel out units of mol to end up with molecules:
2.00mol×6.02×1023molecules1mol =1.204×1024molecules
Thus, 36g of water is equivalent to 1.2×1024molecules
There are 2.1672 × 10²³ molecules in 0.36 moles of water. Details about number of molecules can be found below.
The number of molecules of a substance can be calculated by multiplying the number of moles of the substance by Avogadro's number. That is;
number of molecules = no of moles × 6.02 × 10²³
According to this question, there are 0.36 moles in a sample of water. The number of molecules can be calculated as follows:
no of molecules = 0.36 × 6.02 × 10²³
no of molecules = 2.1672 × 10²³ molecules
Therefore, there are 2.1672 × 10²³ molecules in 0.36 moles of water.
Learn more about number of molecules at: https://brainly.com/question/14919968
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