Which of the following segments are correct and which incorrect and justify your answer. 1) In a solution HCl that has pH=2, we add an amount of NaOH and a solution with pH>7 (25°C) eventuates.

2) If we add water in vinegar, the pH will decrease.

3) A aqueous solution Ca(OH)2 has pH=13. If we volatilise an amount of water, the pH will increase.

4) In a solution HNO3 with pH=1, we add swarf of iron and the pH increases.​

Easy definition for atom and atomic mass

What is the name of this hydrocarbon?

Imagine that you’re getting ready to move to a new city. when people move, they are influenced by push factors and pull factors, and you have many reasons for your move. which of the following factors is an example of a pull factor? a. wanting to move because you’ve found a great new school somewhere new b. needing to move because there are not enough resources in your old hometown c. being forced to move because your old home is gone d. having to move because there are no jobs in your current hometown