The number of moles in the penny can be expressed as:
, where M is the mass of the penny and A is the atomic weight per mole of copper (63.5 g/mol).
We can now get the number of moles in the penny as:
n = 3.1/63.5 = 0.0488 mol
Pennies today are copper-covered zinc, but older pennies are 3.1 g of solid copper. What are the total positive charge and total negative charge in a solid copper penny that is electrically neutral? The density of copper is 8900 kg/m3.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Electric Charge concept. You can view video lessons to learn Electric Charge. Or if you need more Electric Charge practice, you can also practice Electric Charge practice problems.