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Answer :
There are approximately 5.004 moles of aluminum in a 135g sample, calculated by dividing the mass of aluminum by its molar mass (26.98 g/mol).
To calculate the number of moles in 135g of aluminum (Al), we use the atomic mass of aluminum and the following formula:
Number of moles = mass of the substance (g) / molar mass of the substance (g/mol)
The periodic table shows that the atomic mass (rounded to two decimal places) of Al is 26.98, so the molar mass of Al is 26.98 g/mol. Using this information:
Number of moles = 135 g Al / 26.98 g/mol
Now, divide the mass by the molar mass:
Number of moles = 135 / 26.98 mol
Number of moles ≈ 5.004 moles of Al (rounded to three decimal places)
Thus, there are approximately 5.004 moles of aluminum in a 135g sample.
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Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Aluminium, or 26.981538 grams.
