12.8 mole of CO2 from the combustion
I believe it might be A, hope this helps!
Answer:

Explanation:
1. Calculate the moles of copper(II) hydroxide

2. Calculate the molecules of copper(II) hydroxide
1.Lithium has the greater ionization energy
2. Vanadium has a greater ionization energy
Answer:
SAMPLE A - pure substance.
SAMPLE B - homogeneous mixture.
SAMPLE C - heterogeneous mixture.
Explanation: