Answer:
C: The Fe is not balanced
Explanation:
The reaction expression is given as:
Fe₂O₃ + 3H₂ → Fe + 3H₂O
The problem here is to find the specie that is not balanced.
Number of moles
Specie Reactant Product
Fe 2 1
O 3 3
H 6 6
So, we see that Fe is not balanced.
Answer:
Volume of the concentrated solution, which is needed is 103.30 mL
Explanation:
Let's apply the formula for dilutions to solve the problem
Conc. Molarity . Conc. volume = Dil. Molarity . Dil volume
12.1 M . Conc. volume = 2.5 M . 500 mL
Conc. volume = (2.5 M . 500 mL) / 12.1M
Conc. volume = 103.30 mL
Copper was discovered in North Africa.
Answer:
Chemical Change
Explanation:
chemical bonds within the substance have been altered because a new substance has been produced. It cannot be a mixture because they do not involve changes in matter, it cannot be a physical change because they do not result in new substances, it is not a solution because those do not involve changes in matter.
due to there reactive rate?
