5x-15-2x=6
3x=21
x=7
Therefore, x must equal 7.
Answer:
k = 13.5
Step-by-step explanation:
Setup proportion and solve for k:
Convert the mixed number to an improper fraction:
Subtract the fractions to get your final answer:
Answer:
The answer to your question is letter B.
Step-by-step explanation:
The correct answer is letter B because both Copper and Iron as reactants have an oxidation number of zero and when they have reacted their oxidation numbers would be different from those.
A redox reaction is a reaction that involves a transfer of electrons from one atom to another and the oxidation numbers of the reactants are different from the oxidation numbers from the products.
