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Vsevolod [243]
3 years ago
10

What does the Aufbau principle state?

Chemistry
2 answers:
Vikentia [17]3 years ago
8 0
Hello there!

The correct answer is B. Electrons will be added to an atom starting from the lowest possible level or sublevel.

Hope This Helps You!
Good Luck :) 
Sidana [21]3 years ago
3 0

<u>Answer:</u> The correct answer is Option B.

<u>Explanation:</u>

Aufbau principle states that the electron will occupy the lowest energy level first before occupying the higher energy levels.

In filling of electrons, '1s' orbital will be filled first than '2s' orbital because the former has low energy level than the later.

For Example: Filling of electrons in chromium atom.

Chromium is the 24th element of the periodic table and its electronic configuration must be written as: 1s^22s^22p^63s^23p^63d^44s^2

But the actual configuration for this is 1s^22s^22p^63s^23p^63d^54s^1

This configuration is an exception to Aufbau's principle as half filled sub-levels is more stable than other configurations.

Hence, the correct answer is Option B.

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13. Mercury has one of the lowest heat capacities. If 257J of heat are added to 5500g of mercury,the mercury's temp will increas
NikAS [45]

Given:

257J of heat

5500g of mercury

increase by 5.5 degrees Celsius

Required:

Specific heat of mercury

Solution:

H = mCpT

257J = (5500g of mercury) Cp (5.5 degrees Celsius)

Cp = 8.5 x 10^-3 Joules per gram per degree Celsius

3 0
3 years ago
if you can’t already tell by the amount of questions i do not understand chemistry lol, giving brainliest
Vladimir [108]

Answer:

Ok, so the process here is to convert the mass of H2 (hydrogen gas) to moles by dividing the mass by the molar mass of H2. Once you have the moles then you have to multiply by the STP (standard temperature and pressure) molar volume which should be 22.4.

Molar mass of H2 = (1.01)x2 = 2.02g/mol

19.3/2.02 = 9.55 moles

Now just multiply the moles by the molar volume

9.55 moles x 22.4 = 213.92 Litres of H2 are in 19.3g of H2

6 0
3 years ago
If 2 objects have the same density they must have the same
atroni [7]

Answer:

Explanation:

Density can be defined as mass divided by volume. But 2 objects made of the same material will have the same density regardless of their volume.

8 0
3 years ago
Using the information in the table, calculate the number of moles in a \pu{7.89 kg}7.89 kg7, point, 89, space, k, g sample of as
Karolina [17]

We have to find the number of moles in a 7.89 kg sample of aspirin.

The formula of aspirin is: C₉H₈O₄

We are given the molar mass of C, H and O:

H: 1.008 g/mol C: 12.01 g/mol O: 16.00 g/mol

Since one molecule of aspirin has 9 atoms of C, 8 atoms of H and 4 atoms of O, and using the molar masses given, we can calculate the molar mass of aspirin:

molar mass of aspirin = 9 * 12.01 g/mol + 8 * 1.008 g/mol + 4 * 16.00 g/mol

molar mass of aspirin = 180.154 g/mol

Before we find the number of moles we can convert 7.89 kg to g. Since we know that there are 1000 g in 1 kg, we can convert it like this:

1000 g = 1 kg

mass of sample = 7.89 kg * 1000 g/1 kg

mass of sample = 7890 g

Finally, we can find the number of moles in the sample using the molar mass.

number of moles = 7890 g * 1 mol/180.154 g

number of moles = 43.795 moles

Answer: The number of moles in the sample is 43.8 moles (using 3 SF)

7 0
1 year ago
True or False: The products of a chemical
attashe74 [19]

Answer:

true

Explanation:

6 0
3 years ago
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