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UkoKoshka [18]
4 years ago
12

Study the Bohr model shown below.

Chemistry
2 answers:
evablogger [386]4 years ago
8 0
It has 13 electrons so the element name is aluminum.It belongs to 3A group of periodic table
Paladinen [302]4 years ago
4 0

Answer:

Group 3A

Explanation:

3 Electrons in Outer Shell and starts from Boron downwards.

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For an amino acid such as aspartic acid, what impact would you expect a neighboring carboxylic acid to have on the apparent pKa
tekilochka [14]

Answer:

The apparent pKa value for aspartic acid increases

Explanation:

The apparent pKa value for aspartic acid increases.  Due to the presence of one negative in close proximity to another negative charge, it causes charge-to-charge repulsion which in turn leads to the increase in pKa values.

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3 years ago
What value of ℓℓ is not allowed for an electron in an n = 3 shell?
dlinn [17]
Every electron shell, designated by "n", has a specific number of electron subshells. The shell number has values equivalent to natural numbers (1, 2, 3, 4...), while the subshells are s, p, d and f.

The subshell that does not exist within the third shell (n = 3) is the f subshell. The energy of the f subshell is too high and cannot be accommodated in the third shell.
3 0
4 years ago
Which is true about an invading species?
lys-0071 [83]
B. Has natural predators to limit population
5 0
3 years ago
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All minerals on the mohs hardness scale are hard enough to scratch a piece of glass is it true or false
11Alexandr11 [23.1K]
The answer is false
8 0
3 years ago
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when fully inflated a hot air balloon has a volume of 1.6 *10^5 L ( liter) an average temperature of 373k and 0 967 atm . 1) Ass
Sidana [21]
1.  First, you have to find the number of moles 1.6z10^5L of gas is at 373K and 0.967atm using PV=nRT solving for n. (n=PV/RT).  Everything is in the correct units and we know R is going to be 0.08206atmL/molK since it is a constant.  
n=(0.967atmx160000L)/(0.08206atmL/molKx373K)
n=5054.8mol gas
Then you have to find the the number grams which can be found using the molar mass given as 29g/mol.  multiply 29g/mol by the number of moles of gas we found in the previous step.
5054.8molx29g/mol=146589.9g of gas
Lastly, to find the density of the gas you need to divide the mass of the gas by its volume.
146589.9g/160000L=0.916g/L

2. The dinsity of the gas at STP should be higher than the density of gas with the given conditions.  This is due to the fact that the given conditions involves a higher temperature than that of at STP which will cause the gas to expand therefore increasing the volume with out increasing the mass.  The reason why the pressure is not building up even though the pressure is higher is that the balloon is not sealed meaning the gas can maintain about atmospheric pressure while expanding since the excess are just leaves the balloon.
the answer to part 2 can be proven by the fallowing:
To find the density of the gas at STP you first multiply the molar volume of gas at STP by the number of moles of gas from part 1 to get the volume of the gas at STP.
5054.8molx22.4L/mol=113228L
Then you divide the mass form part by the new volume to get the new density.
<span>146589.9g/113228L=1.30g/L</span>

I hope this helps.  Let me know in the comments if any of it is unclear. 
4 0
4 years ago
Read 2 more answers
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