The answer should be C.
In the website, the purpose of it is to promote the product, therfore, they will claim all the benefits, no matter it is true or not.
However, in a university study, the purpose is not to promote. They will make sure the test fair and reliable. They have the best equipments and tools and the top investigators.
Therfore, a university study is the best source.
Rare earth elements are a series of chemical elements found in the earth's crust and are vital to many of the modern technologies in the world such as computers and networks, advanced transportation and consumer electronics. They help fuel economic growth, maintain high living standards and even save lives. Examples include:
Scandium. Used in television and fluorescent lamps.
Yttrium. Used in cancer treatment drugs, superconductors and camera lenses
Lanthanum. Used to make special optical glasses, telescope lenses and also in petroleum refining.
Neodymium. Used in making some of the strongest permanent magnets, found in most modern vehicles and aircraft.
<span>There
are a number of ways to express concentration of a solution. This includes
molarity. Molarity is expressed as the number of moles of solute per volume of
the solution. We calculate as follows:
</span>
2.5 M HCl = 2.5 mol HCl / L soln
0.306 mol HCl / 2.5 mol HCl/L son = 0.1224 L soln needed
M1V1 = M2V2
18 M(V1) = 2.5 M(0.1224 L)
V1 = 0.017 L of the 18 M solution
Answer:
A. 2.139g of KIO3
B. 26.67mL
Explanation:Please see attachment for explanation
