A modern-day nickel is 25% nickel and 75% copper. Every nickel weighs exactly five grams. Using this information, how many nickel coins do you need to have before you have a mol…

Question

asked Jan 18, 2021 102k views

1 Answer

Riyad · Answer 1 · 2021-01-22T22:18:38+0000

Answer:

Step-by-step explanation:

The atomic mass of nickel is 58.963g/mol. Thus, one mole of nickel weighs "exactly" 58.693g.

How much nickel does every coin contain?

$25\%\text{ of }5g=0.25* 5g=1.25g\text{ of nickel per coin}$

How many times 58.693g contains 1.25g?

$(58.693g)/(1.25g/coin)=46.95\approx47coins$

That means that you need to have 47 coins of nickel to have one mole of nickel.