Answer:
Molarity of solution is 0.0928 M.
Explanation:
Balanced equation:
Number of moles of in 10.8 mL of 0.0215 M solution
= = 0.000232 moles
Let's assume molarity of solution is S(M)
Number of moles of in 12.50 mL of S(M) solution
= = 0.0125S moles
According to balanced equation, 5 moles of react with 1 mol of
So, 0.0125S moles of react with moles of
Hence,
or, S = 0.0928
So, molarity of solution is 0.0928 M.
8.43
58.44g/mol*1/6.93g= 8.43moles of NaCL
Answer:
The answer to your question is: Iron oxidizes and Copper reduces
Explanation:
An element oxidizes when it loses electrons
An element reduces when it gains electrons
Then
Fe ⇒ Fe⁺² Now, is more positive, it loses electrons
Cu⁺² ⇒ Cu Now, is more negative, it gains electrons
Iron oxidizes and Copper reduces
Each description is dragged into the most appropriate bin.
Answer : The chemical formula of pure substances are different from those of mixtures because all the matter that exists on earth can be classified into two categories namely; pure substances and mixtures.
A pure substance always consists of a single element or compound. Example Oxygen is formed only of oxygen (O) atoms; whereas the table salt which is formed only by sodium chloride (NaCl) molecules is a compound which is made up of pure elements. A pure substance cannot be further divided into its components.
A mixture is made up of different compounds and/or elements. It can be easily separated using any physical method. Example, sand, salt and saw dust mixed together as a mixture. Also, it will not have a definite chemical formula.
Please refer the attachment for better understanding.