Does a precipitate form when you react zinc with potassium phosphate?
1 answer:
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<u>Answer:</u> The molarity of solution is 0.274 M and the osmotic pressure of the solution is 6.70 atm
<u>Explanation:</u>
To calculate the molarity of the solution, we use the equation:
We are given:
Given mass of estrogen = 13.5 g
Molar mass of estrogen = 272.40 g/mol
Volume of solution = 181 mL
Putting values in above equation, we get:
Hence, the molarity of solution is 0.274 M
To calculate the osmotic pressure of the solution, we use the equation:
where,
= osmotic pressure of the solution = ?
i = Van't hoff factor = 1 (for non-electrolytes)
M = molarity of solute = 0.274 M
R = Gas constant =
T = temperature of the solution = 298 K
Putting values in above equation, we get:
Hence, the osmotic pressure of the solution is 6.70 atm
The structures of the isomers and the m/z values of their peaks are not given in the question. The complete question is provided in the attachment
Answer:
Compound 2 (2,5-dimethylhexane) will not have the peaks at 29 and 85 m/z
Explanation:
The fragmentation of molecules by electron ionization of mass spectrometer occurs according to Stevenson's Rule, which states that "The most probable fragmentation is the one that leaves the positive charge on the fragment with the lowest ionization energy". This is much like the Markovnikov's Rule in organic chemistry which has predicted the formation of most stable carbocation and the addition of hydrogen halide to it.
The mass spectra of compound 1 (2,4-dimethylhexane) will contain all the m/z values mentioned in the question. Each peak indicate towards homologous series of fragmentation product of the compound 1. The first peak can be attributed to ethyl carbocation (m/z = 29), with the increase of 14 units the next peak indicates towards propyl carbocation (m/z = 43) and onwards until molecular ion peak of 114 m/z.
Compound 2 (2,5-dimethylhexane) structure shows that the cleavage of C-C bond will not yield a stable ethyl and hexyl carbocation. Hence, no peaks will be observed at 29 and 85 m/z. The absence of these two peaks can be used to distinguish one isomer from the other.
