Answer:
[H₃O⁺] → 0.063 M
Explanation:
To determine the pH, our formula is:
- log [H₃O⁺]
To determine the [H⁺] we have to apply the inverse function
10^-pH = [H₃O⁺]
10⁻¹'²⁰ = [H₃O⁺] → 0.063 M
An object becomes negatively charged when it gains electrons, because electrons have a negative charge.
The answer is 1. This is because electronegativity increases up a group and across a period. So metals are going to be the least electronegative. 4.0 is the most electronegative element on Paulina's Scale!
Answer:
The wavelength the student should use is 700 nm.
Explanation:
Attached below you can find the diagram I found for this question elsewhere.
Because the idea is to minimize the interference of the Co⁺²(aq) species, we should <u>choose a wavelength in which its absorbance is minimum</u>.
At 400 nm Co⁺²(aq) shows no absorbance, however neither does Cu⁺²(aq). While at 700 nm Co⁺²(aq) shows no absorbance and Cu⁺²(aq) does.
Relative dating can also be done by comparing the relative ages of rock layers in different areas. A geologic column is an ordered arrangement of rock layers based on the relative ages of the rocks, with the oldest rocks at the bottom.