A chemistry student was able to recover 98 grams of copper from a redox reaction experiment. How many moles of copper was she able to recover?
________ moles of copper. Do NOT enter the unit and report your final answer with 3 SFs.
divide 98 by the atomic weight of Cu.
@oobleck so it would be 98/63.546?
Yes, but I don't understand how you can give an answer to 3 s.f. when 98 has only 2 s.f.
To determine the number of moles of copper recovered, we need to use the molar mass of copper.
The molar mass of copper (Cu) is approximately 63.546 grams/mole.
To find the number of moles, we will divide the mass of copper (98 grams) by the molar mass of copper:
Number of moles = Mass of copper / Molar mass of copper
= 98 g / 63.546 g/mol
Using a calculator, we can calculate this:
Number of moles ≈ 1.541 moles
Therefore, the student was able to recover approximately 1.541 moles of copper.