A copper atom has a mass of 1.06*10 to power of -22g and a penny has a mass of 2.5g
Use this information to answer the question below be sure your answer has the correct number of significant digits
How many moles of copper atoms have a mass equal to the mass of a penny
To find the number of moles of copper atoms with a mass equal to the mass of a penny, we divide the mass of the penny by the mass of a copper atom.
Mass of a penny = 2.5 g
Mass of a copper atom = 1.06 × 10^(-22) g
Number of moles = (Mass of the penny) / (Mass of a copper atom)
= 2.5 g / (1.06 × 10^(-22) g)
Using a scientific calculator, we find:
Number of moles = 2.36 × 10^22 mol
Therefore, the number of moles of copper atoms with a mass equal to the mass of a penny is 2.36 × 10^22 mol.
To determine the number of moles of copper atoms that have a mass equal to the mass of a penny, we need to use the molar mass of copper (Cu).
First, let's calculate the number of moles in a penny:
Mass of penny = 2.5 g
Next, we'll determine the molar mass of copper (Cu):
Molar mass of Cu = 63.55 g/mol
Now, we can use the following formula to calculate the number of moles:
Number of moles = Mass / Molar mass
Number of moles = 2.5 g / 63.55 g/mol
Number of moles ≈ 0.03935 mol
Therefore, there are approximately 0.03935 moles of copper atoms that have a mass equal to the mass of a penny.
To find the number of moles of copper atoms that have a mass equal to the mass of a penny, you need to use the given mass of the penny (2.5g) and the mass of a single copper atom (1.06x10^-22g). The formula to calculate the number of moles is:
moles = mass / molar mass
First, we need to calculate the molar mass of copper (Cu). The molar mass is the mass of one mole of a substance, expressed in grams. The atomic mass of copper (Cu) is approximately 63.55 g/mol.
Now, we can calculate the number of moles of copper atoms:
moles = 2.5g / 63.55 g/mol
moles = 0.0394 mol
Therefore, there are approximately 0.0394 moles of copper atoms that have a mass equal to the mass of a penny.