Answer:
Reduction potential (Eo) is defined as a tendency of a chemical species to be reduced by gaining an electron and is defined with electrochemical reference of hydrogen, which is globally given the reduction potential of zero [24].
Explanation:
Answer: Breathing through a mask decreases the amount of oxygen we need to live & be. The only potentially toxic molecule that you routinely exhale is carbon dioxide. Carbon dioxide would not be trapped by a mask.
Explanation:
Answer:
[KI] = 0.25 M
Explanation:
Solute: KI
Mass of solute: 0.50 mol . 166 g / 1mol = 83 g
Our solution volume is 2L
Molarity is a kind of concentration, defined as the moles of solute contained in 1L of solution. It is the most common concentration for all solutions while there are any other kind, for example molality, mole fraction or ppm.
In this case molarity (mol/L) is 0.5 mol /2L = 0.25 M
In conclussion, solution is 0.25 molar whichs is the same to say, that 0.25 moles of potassium iodide are contained in 1L of solution.
With the data given, we can also make a rule of three:
2L of solution contain 0.5 moles of KI
Then, 1L of solution may contain (0.5 . 1) /2 = 0.25 moles of Ki
1. For this question, the adjective small must be percepted in a relative sense. This is because it is not the smallest ion (that would be hydrogen). It could be that the antimony and beryllium ions are smaller compared to their neutral forms. This is because they donate electrons when ionized. As a result, the electrons are reduced, so does the electron cloud which makes the radius much smaller.
2. The periodic table is arranged in terms of increasing atomic number. For neutral atoms, the number of protons (atomic number) is equal to the number of electrons. So, the farther we go down the table, the higher the atomic number. The higher the atomic number, the bigger the electron cloud which makes the atomic radius bigger. Because by definition, atomic radius is the length from the nucleus to the farthest electron from the nucleus.
Answer:
4
Explanation:
Net worth means it has to be -4. Electrons have a negative charge, so 4 electrons is equivalent to -4.