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How many atoms of lead are there in 25g of lead? Solve the question with equations and show the steps
Accepted Answer
Step 1: Convert the mass of lead to moles using its molar mass.
The molar mass of lead (Pb) is 207.2 g/mol. To convert 25 g of lead to moles, we use the formula:
moles of Pb = mass of Pb (g) / molar mass of Pb (g/mol)
moles of Pb = 25 g / 207.2 g/mol
moles of Pb ≈ 0.1206 mol
Step 2: Use Avogadro's number to convert moles of lead to the number of atoms.
Avogadro's number is 6.022 × 10^23 atoms/mol. This means that 1 mole of any substance contains 6.022 × 10^23 atoms of that substance.
To convert 0.1206 mol of lead to the number of atoms, we use the formula:
number of atoms = moles of Pb × Avogadro's number
number of atoms ≈ 0.1206 mol × 6.022 × 10^23 atoms/mol
Therefore, there are approximately 7.256 × 10^22 atoms of lead in 25g of lead.
The molar mass of lead (Pb) is 207.2 g/mol. To convert 25 g of lead to moles, we use the formula:
moles of Pb = mass of Pb (g) / molar mass of Pb (g/mol)
moles of Pb = 25 g / 207.2 g/mol
moles of Pb ≈ 0.1206 mol
Step 2: Use Avogadro's number to convert moles of lead to the number of atoms.
Avogadro's number is 6.022 × 10^23 atoms/mol. This means that 1 mole of any substance contains 6.022 × 10^23 atoms of that substance.
To convert 0.1206 mol of lead to the number of atoms, we use the formula:
number of atoms = moles of Pb × Avogadro's number
number of atoms ≈ 0.1206 mol × 6.022 × 10^23 atoms/mol
Therefore, there are approximately 7.256 × 10^22 atoms of lead in 25g of lead.
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