option A.
The number of valence electrons of an element can be determined by the periodic table group (vertical column) in which the element is categorized
Answer:
∆t(f) = 49.755C
Explanation:
Freezing point is defined as the point in which a liquid changes from liquid to solid state. Therefore, to calculate the freezing point of aqueous solution of propanol
∆t = k × I × m
Where k is cryscopic constant =
I = vant Hoff factor = 2
M = molar concentration = 12.25m
∆t (f) = 1.9 × 12.25 × 2 = 49.755C
The answer is 10. Each capital letter is an atom. The tiny numbers represent how many atoms of that type
Answer: A
Explanation: Calculate the molar hydrogen ion concentration of each of the following biological solutions given the pH, Urine pH= 4.90
The anode is charged positively. Oxidation happens on the anode.
For example,
(anode +) Zn - 2e⁻ = Zn²⁺
