Question

Consider the given reaction below (hint!: Make sure the equation is balanced):
Al (s) + CuO (s)  Al2O3 (s) + Cu (s)
a. What mass (in grams) of copper can be produced when excess aluminum reacts with
12.8 grams of copper(II) oxide?

12.8/79.545 = 0.16091520523
0.16091520523 * 63.546 u = 10.2255176 atomic mass units

10.2

Answer 1

b. What is the limiting reactant?

CuO

Answer 2

check part a) again. you're assuming a 1:1 ratio between Al and Cu but that's not true (balance the equation first)

Answer 3

part b is correct

Answer 4

actually nvm for part a) it ends up being 3 moles CuO to 3 moles Cu so it ends up being 1:1 anyway

Answer 5

so both correct?

Answer 6

yes, just want to point out that the units for part b) should be in grams not amu

Answer 7

thank you!