Answer:
I needed some free points that's why I am doing so
Explanation:
here is the answer. Feel free to ask for more chem help
A change of one unit on the pH scale represents a change in the concentration of hydrogen ions by a factor of 10, a change in two units represents a change in the concentration of hydrogen ions by a factor of 100. Thus, small changes in pH represent large changes in the concentrations of hydrogen ions.
A heterogeneous mixture is a mixture in which its components retain their identity. The correct answer is B.
The scientific notation should specific the significant digits. So it to write like x.xx * 10 ^ x. So the answer is 6.421 * 10 ^3.
