Hello Mlbozer,
Hope your having a great day! Gasses are known for having molecules that 'run' in a way. They all are Spread Out, and bounce off each other. Its a big mess, and is more 'spread out' than even liquid, in fact its the most open form of the three! So your answer is false!
Thank you,
Darian D.
Answer:
Choice a. The compound name is alphabetized incorrectly.
The correct IUPAC name of this compound should be:
4-ethyl-2,2-dimethylheptane.
Explanation:
Draw the carbon backbone structure for "2,2-dimethyl-4-ethylheptane":
.
The seven-carbon backbone is indeed the longest chain in this compound.
.
Numbering from the end with the two methyl groups indeed minimizes the number on each group. However, the alphabetical order of the groups is not correct. There are two kinds of substitute groups in this compound:
- Two methyl groups, and
- One ethyl group.
The name for them will be
- 2,2-dimethyl, and
- 4-ethyl.
Ignore the multiplier prefixes (di-, tri-, etc.) while alphabetizing.
The ethyl group shall be placed before the two methyl groups. The name of the compound shall be:
4-ethyl-2,2-dimethylheptane.
Answer : -69.286 KJ heat energy is liberated.
Solution : Given,
Standard enthalpy of formation : When one mole of a substance is formed from its constituent elements.
(for 1 mole)
Mass of Mn = 7.9 g
Molar mass of Mn = 54.93 g/mole
First we have to calculate the moles of Mn.
The formation reaction of is represented as,
For this reaction, the standard enthalpy of formation is,
From the reaction, we conclude that
4 moles of Mn releases heat energy = -1924.6 KJ
0.144 moles of Mn releases heat energy =
Therefore, -69.286 KJ heat energy is liberated.
Answer:
There are 10.0 moles of beryllium oxide in a 250 grams sample of the compound.
Explanation:
We can calculate the number of moles (η) of BeO as follows:
Where:
m: is the mass = 250 g
M: is the molar mass = 25.0116 g/mol
Hence, the number of moles is:
Therefore, there are 10.0 moles of beryllium oxide in a 250 grams sample of the compound.
I hope it helps you!
They got to plant heven lol! XD XD