There are 3.20e22 atoms of copper in the outer shell of pennies. How many grams of copper is this?
I don't know what you mean by the outer shell of pennies but in 3.2oE22 atom of Cu there are
mols Cu = 3.20E22/6.02E23 = ?
Then g = mols Cu x atomic mass Cu = ?
3.38g
To calculate the number of grams of copper, we first need to find the molar mass of copper. The molar mass of copper (Cu) is 63.546 grams per mole.
Next, we need to find the number of moles of copper atoms in 3.20e22 atoms. To do this, we divide the given number of atoms by Avogadro's number, which is approximately 6.022e23 atoms per mole.
Number of moles of copper = (3.20e22 atoms) / (6.022e23 atoms/mol)
Calculating this, we get:
Number of moles of copper = 0.053 mol
Finally, we can calculate the mass of copper using the formula: mass = number of moles × molar mass.
Mass of copper = (0.053 mol) × (63.546 g/mol)
Calculating this, we get:
Mass of copper = 3.378 g
Therefore, there are approximately 3.378 grams of copper in the outer shell of pennies.
To find the number of grams of copper, we can use the molar mass of copper and Avogadro's number to convert from the number of atoms to grams.
1. Find the molar mass of copper (Cu) from the periodic table. The molar mass of copper is approximately 63.55 grams/mol.
2. Use Avogadro's number (6.022 × 10^23 atoms/mol) to convert the number of copper atoms to moles. The given number of atoms is 3.20e22 atoms.
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Conversion calculation steps:
(3.20e22 atoms) / (6.022 × 10^23 atoms/mol) = x moles (Cu)
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3. Multiply the moles by the molar mass to get the mass in grams.
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Calculation:
x moles (Cu) * 63.55 grams/mol = y grams (Cu)
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Simplify the equation by plugging in the value of x from the previous calculation:
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(3.20e22 atoms) / (6.022 × 10^23 atoms/mol) * 63.55 grams/mol = y grams (Cu)
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After performing the calculations, you will find the number of grams of copper in the outer shell of pennies.