A student mixes two solutions together. One is believed to be HI, the other is believed to be HNO3. A precipitate forms. Believi
1 answer:
Answer:
The presence of <em>silver nitrate impurities</em> is the most probable cause for the initial precipitate result.
Explanation:
In test for halide ions, silver nitrate is used to test for the presence of soluble halide ions. The presence of
in the reaction mixture (possibly the HNO3) gave the semblance of test for chlorides, allowing for formation of precipitation in the initial experiment.
This error could have been caused by handling of reagents and used laboratory apparatus during the initial reaction.
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Answer: If a hydrogen atom and a helium atom have the same kinetic energy then the wavelength of the hydrogen atom will be roughly equal to the wavelength of the helium atom.
Explanation:
The relation between energy and wavelength is as follows.
This means that energy is inversely proportional to wavelength.
As it is given that energy of a hydrogen atom and a helium atom is same.
Let us assume that . Hence, relation between their wavelengths will be calculated as follows.
... (1)
... (2)
Equating the equations (1) and (2) as follows.
Thus, we can conclude that if a hydrogen atom and a helium atom have the same kinetic energy then the wavelength of the hydrogen atom will be roughly equal to the wavelength of the helium atom.
Answer:
1.7 mol/dm3
Explanation:
working out in the image
