How many atoms of aluminum are there in 125 g of aluminum foil?
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To determine the number of atoms in a given mass of aluminum foil, you need to use the concept of Avogadro's number and the molar mass of aluminum.
1. Find the molar mass of aluminum: The molar mass of aluminum is given as 26.98 g/mol. This means that one mole of aluminum has a mass of 26.98 grams.
2. Calculate the number of moles of aluminum: Divide the given mass of aluminum foil (125 g) by the molar mass of aluminum (26.98 g/mol).
moles of aluminum = mass of aluminum foil / molar mass of aluminum
= 125 g / 26.98 g/mol
3. Use Avogadro's number: Avogadro's number (6.022 × 10^23) represents the number of particles (atoms, molecules, etc.) in one mole of a substance.
number of atoms = moles of aluminum × Avogadro's number
Substitute the value of moles of aluminum from step 2 and Avogadro's number to calculate the number of atoms.
4. Calculate the number of atoms of aluminum in 125 g of aluminum foil using the formula:
number of atoms = (125 g / 26.98 g/mol) × (6.022 × 10^23)
Perform the calculation to find the number of atoms of aluminum.
Note: The result will be in scientific notation due to the large value of Avogadro's number.
find the number of moles of al.
then multiply by avagradro's number.
1. Divide the grams of aluminum by the molar mass of aluminum (26.98g/mole) to convert mass to moles.
2. Multiply the number of moles of aluminum by Avogadro's Number (6.02x10^23 atoms/mole).