We want to find how much charge is on the
electrons in a nickel coin. Follow this method.
A nickel coin has a mass of about 4 g.
Find the number of atoms in a nickel coin.
Each mole (6.02 × 1023 atoms) has a mass of
about 57.9 g.
Answer in units of atoms
To find the number of atoms in a nickel coin, we will follow these steps:
Step 1: Calculate the number of moles of nickel in the coin.
To do this, divide the mass of the nickel coin by the molar mass of nickel.
Molar mass of nickel (Ni) = 57.9 g/mol
Number of moles of nickel = mass of nickel coin / molar mass of nickel
= 4 g / 57.9 g/mol
Step 2: Calculate the number of atoms in the coin.
One mole of any substance contains 6.02 × 10^23 atoms (Avogadro's number).
Number of atoms in a nickel coin = Number of moles of nickel * Avogadro's number
= (4 g / 57.9 g/mol) * (6.02 × 10^23 atoms/mol)
Calculating this gives us the number of atoms in a nickel coin.
To find the number of atoms in a nickel coin, we need to follow these steps:
Step 1: Calculate the number of moles in the nickel coin.
The mass of the nickel coin is given as 4 g, and we know that 1 mole of nickel contains approximately 6.02 × 10^23 atoms, with a mass of about 57.9 g. We can set up a proportion to find the number of moles in the coin:
(4 g) / (57.9 g) = x moles / (6.02 × 10^23 atoms)
Solving for x (the number of moles in the coin), we get:
x = (4 g) / (57.9 g) * (6.02 × 10^23 atoms)
x ≈ 4.156 × 10^21 moles
Step 2: Convert moles to atoms.
Since we know that 1 mole is equal to 6.02 × 10^23 atoms, we can multiply the number of moles by this conversion factor to find the number of atoms:
Number of atoms = (4.156 × 10^21 moles) * (6.02 × 10^23 atoms/mole)
Number of atoms ≈ 2.5 × 10^45 atoms
Therefore, there are approximately 2.5 × 10^45 atoms in a nickel coin.
Please note that the given mass value for the nickel coin might not be exact, and the number of atoms calculated here is an approximation based on the provided data.