How many molecules are there in 1.82 g of caffeine? Molar mass of caffeine = 194.19 g mol-1[Reminder: 1e47 is the same as 1 x 1047]Question 3Answer1.56e-260.009375.64e212.13e265.64e18
Question
How many molecules are there in 1.82 g of caffeine? Molar mass of caffeine = 194.19 g mol-1[Reminder: 1e47 is the same as 1 x 1047]Question 3Answer1.56e-260.009375.64e212.13e265.64e18
Solution
To find the number of molecules in 1.82 g of caffeine, we need to follow these steps:
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First, we need to convert grams to moles. We know that the molar mass of caffeine is 194.19 g/mol. So, we divide the given mass of the caffeine by its molar mass:
1.82 g / 194.19 g/mol = 0.00937 mol
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Next, we use Avogadro's number (6.022 x 10^23 molecules/mol) to convert moles to molecules:
0.00937 mol x 6.022 x 10^23 molecules/mol = 5.64 x 10^21 molecules
So, there are approximately 5.64 x 10^21 molecules in 1.82 g of caffeine.
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