Option C: elements produce spectra with only few distinct lines.
The spectra are not continuos and are different for every element. This permits to identify elements.
C=10⁻⁶ mol/L
pH=14-pOH
pOH=-lg[OH⁻]
pH=14+lg10⁻⁶=14-6=8
B. pH = 8
False, pushing a sofa on a hardwood floor would be easier than on carpet.
Answer:0.00000009
Explanation:
9.11 × （1/1000000000）=0.00000009
