Question

Can someone please check my work? <3

Answer 1

Problem: Pennies today are copper-covered zinc, but older pennies re 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?

Answer 2

My attempt at solving it:

\[3.1 g Cu \times \frac{ 1 mol Cu }{ 63.54 g Cu }\times \frac{ 6.022 x 10^{23} }{ 1 mol Cu }= 2.9 \times10^22 atoms of Cu\]

Answer 3

then multiply the # of atoms of Cu by 29 (# of protons and electrons)
= 8.41 e^23
that times 1.6 x 10^19 Coulomb

Answer 4

I get an answer of 134560 Coulombs?