Answer:
B.
Explanation:
Na is Sodium and Cl is Chlorine [Chloride]
Answer:
C. Magnetization of iron
Explanation:
This is a chemical change and cannot be undone by physical means therefore it isn't a physical change
Explanation:
The required concentration of M1 =0.222 M.
The required volume of is V1 =225 mL.
The standard solution of is M2 =16 M.
The volume of standard solution required can be calculated as shown below:
Since the number of moles of solute does not change on dilution.
The number of moles
Hence, 3.12 mL of 16 m nitric acid is required to prepare 0.222 M and 225 mL of nitric acid.
Answer:
Explanation:
A physical change is one where only physical, not chemical, properties change. Let's analyze each answer choice.
A. Change in odor
- A change in order is one of the signs of a chemical change.
B. Chopping
- Chopping is a physical change, because no new substances are produced. However, it's not reversible. It's impossible to put something chopped back together again permanently.
C. Phase change
- A phase change is another physical change, plus it is reversible. For example, you can freeze water into ice and melt it back to water.
D. Rusting
- Rusting is a chemical change, because new substances are created.
So, the best answer choice for a reversible physical change is <u>C. phase change</u>.
Answer:
The concentration in this apple juice just makes the taste very strong and powerful, the taste comes out perfectly.
Explanation: