TYPE OUT EXTREMELY NEATLY PLEASE AND SHOW ALL YOUR WORK. Use significant figures where appropriate
1 answer:
<u>Answer:</u> The number of moles of nitrogen gas is 9.9 moles.
<u>Explanation:</u>
To calculate the mass of bromine gas, we use the ideal gas equation, which is:
PV = nRT
where,
P = Pressure of nitrogen gas = 2.30 atm
V = Volume of nitrogen gas = 120.0 L
n = Number of moles of nitrogen gas = ? mol
R = Gas constant =
T = Temperature of nitrogen gas = 340 K
Putting values in above equation, we get:
Rule of significant figures in case of multiplication and division:
The least number of significant figures in any number of the problem will determine the number of significant figures in the solution.
Here, the least precise number of significant figures are 2. Thus, the number of moles of nitrogen gas is 9.9 moles.
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Answer:
See explanation and image attached
Explanation:
Alkenes undergo hydrogenation to give the corresponding alkanes. Where the structure of the original alkene is unknown, we can deduce the structure of the alkene from the structure of the products obtained when it undergoes various chemical reactions.
Now, the fact that we obtained 2-methylhexane upon hydrogenation and the two compounds had different heats of hydrogenation means that the two compounds were geometric isomers. The original compounds must have been cis-2-methyl-3-hexene and trans-2-methyl-3-hexene.
When reacted with HCl, the same compound C7H15Cl is formed because the stereo chemistry is removed.
However, we know that the trans isomer is more stable than the cis isomer hence the cis isomer always has a higher heat of hydrogenation than the trans isomer. Thus X is cis-2-methyl-3-hexene.
