Answer:
moles = 3.057x10⁻⁵ moles of C₆H₈O₆
Explanation:
In order to do this, we need to write the balanced reaction that is ocurring here.
In the titration we have:
KIO₃ + 6H⁺ + 5I⁻ --------> 3I₂ + 3H₂O + K⁺
As for the ascorbic acid solution:
C₆H₈O₆ + I₂ -------> C₆H₆O₆ + 2I⁻ + 2H⁺
From these two reactions, we can see that the KIO₃ solution reacts always with 3 moles of I₂, so, if the moles of C₆H₈O₆ are the same moles of I₂, we can assume that KIO₃ reacts with 3 moles of C₆H₈O₆. Therefore, the expression to use will be:
3n₁ = n₂
3M₁V₁ = M₂V₂
M₂ = 3M₁V₁ / V₂
Replacing we have:
M₂ = 3 * 0.001 * 10.19 / 25
M₂ = 0.001223 M
Finally the moles of ascorbic acid:
moles = 0.001223 * 0.025
<h2>
moles = 3.057x10⁻⁵ moles of C₆H₈O₆</h2>
Hope this helps
Answer:
D. the capacity to do work
Explanation:
the basic definition of energy is the ability to do work
Answer:
The answer to your question is molality = 0.34
Explanation:
Data
mass of NaBr = 14.57 g
mass of water = 415 g.
molality = ?
Process
1.- Calculate the molar mass of NaBr
NaBr = 23 + 80 = 103 g
2.- Calculate the moles of NaBr
103 g of NaBr ------------------ 1 mol
14.57 g of NaBr --------------- x
x = (14.57 x 1) / 103
x = 14.57 / 103
x = 0.141 moles
3.- Calculate the molality
molality = moles / volume
-Substitution
molality = 0.141 / .415
-Result
molality = 0.34
Answer:
1. Used in many smoke detectors for homes and businesses to measure levels of toxic lead in dried paint sample to ensure uniform thickness in rolling processes like steel and paper production and to help determine where oil wells should be drilled.
2.Used to treat cancerous tumors to measure correct patient dosages of radioactive pharmaceutical to measure and control the liquid flow in oil pipelines to tell researchers whether oil wells are plugged by sand and to ensure the right fill level for packages of food, drugs, and other
products.
3.Used in medical diagnosis
4.Used to treat thyroid disorders. (Graves’s disease).
5.Used in molecular biology and genetics research.
6.Used in nuclear medicine for lung ventilation and blood flow studies.
7.Used in dental fixtures like crowns and dentures to provide a Uranium-234 natural color and brightness.
8.Used in electric blanket thermostats and to gauge the thickness of thin plastics, thin sheet metal, rubber, textile and paper.