1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
asambeis [7]
3 years ago
8

1 point There are 118 known elements. How many elements have atoms, in their ground-state, with core electrons whose quantum num

bers are n
Chemistry
1 answer:
Diano4ka-milaya [45]3 years ago
8 0

The question is incomplete; the complete question is;

There are 118 known elements. How many elements have atoms, in their ground state, with core electrons whose quantum numbers are n=3 and l=1?

a. 10

b. 6

c. 100

d. 18

Answer:

c. 100

Explanation:

If we look closely at the periodic table, we will notice that there 100 elements that occur after argon whose electronic configuration is; 1s2 2s2 2p6 3s2 3p6.

This means that there every other element after argon must have a 3p sublevel as part of its core electrons. In the 3p sublevel, n=3 and l=1.

If we diligently count the number of elements from potassium (immediately after argon) to Oganesson (element 118) we have a total of 100 elements all having core electrons of quantum numbers are n=3 and l=1.

You might be interested in
Enter your answer in the provided box. Calculate the volume of a 1.420 M NaOH solution required to titrate 40.50 mL of a 1.500 M
Nikolay [14]

Explanation:

Below is an attachment containing the solution.

7 0
3 years ago
What mass of CO2 can be produced from the decomposition of 4.8 moles of Fe2(CO3)3?
gavmur [86]

Answer: 633.6 g of CO_2 can be produced from the decomposition of 4.8 moles of Fe_2(CO_3)_3

Explanation:

The balanced chemical equation for decomposition of Fe_2(CO_3)_2 is :

Fe_2(CO_3)_2\rightarrow Fe_2O_3+3CO_2

According to stoichiometry :

1 mole of Fe_2(CO_3)_2 produce = 3 moles of CO_2

Thus 4.8 moles of Fe_2(CO_3)_2 will rproduce=\frac{3}{1}\times 4.8=14.4moles  of CO_2

Mass of CO_2=moles\times {\text {Molar mass}}=14.4moles\times 44g/mol=633.6g

Thus 633.6 g of CO_2 can be produced from the decomposition of 4.8 moles of Fe_2(CO_3)_3

7 0
4 years ago
The layers of earth are the crust, mantle, and core, with the core being divided into inner and outer layers. Which of the follo
Westkost [7]

Answer:

C- The core is made up of dense elements, such as iron and nickel.

6 0
3 years ago
The radiator in a car is filled with a solution of 60% antifreeze and 40% water. The manufacturer of the antifreeze suggests tha
lakkis [162]

Answer:

0.6 Liters of coolant should be drained and 0.6 Liter of water should be added.

Explanation:

Volume of the radiator = 3.6 L

Percentage of antifreeze = 60%

Total volume of anti freeze in radiator = 60% of 3.6 L :

\frac{60}{100}\times 3.6 = 2.16 L

Percentage of water= 40%

Given,optimal cooling of the engine is obtained with only 50% antifreeze.

So, now we want to reduce the percentage of antifreeze from 60% to 50 %

Volume of coolant removed = x

Volume of water added = x

Volume of anti freeze removed = 60% of(x) = 0.6x

Volume of antifreeze left in radiator  =50% of 3.6 L = \frac{50}{100}\times 3.6=1.8 L

1.8 Liter is the desired volume of the antifreeze.

Total volume - Removed volume = desired  volume

2.16 L - 60% of( x) = 1.8 L

2.16 L-0.6x=1.8 L

x=\frac{2.16 l- 1.8 L}{0.6}=0.6 L

0.6 Liters of coolant should be drained and 0.6 Liter of water should be added.

4 0
4 years ago
If a sample of 4 moles of gas has a pressure of 567.42 kPa and a volume of 12.0 L, what is it's temperature?
Lady_Fox [76]
Your answer is b, hope this helps ;)
7 0
3 years ago
Read 2 more answers
Other questions:
  • Using 273.15 K as the value for Zero degree Celsius convert 45.1° C to Kelvin. 6.05 K 318 K 318.3 K 1.23 x 104 K
    7·1 answer
  • Based on these ideas, what are the pro's and con's for both Sexual Reproduction and Asexual reproduction?
    11·1 answer
  • How are elements usually found?
    6·2 answers
  • The radius of a uranium atom is 149 pm. How many uranium atoms would have to be laid side by side to span a distance of 4.96 mm?
    11·2 answers
  • How many grams of HF are needed to react with 3.0 moles of Sn? *
    6·1 answer
  • What is the bronsred base of NO2- +H2O HNO2 +OH-
    6·1 answer
  • 3. What did the Civil Rights Act of 1964 require?
    9·1 answer
  • Assuming the gas is at standard temperature and pressure, how many milliliters make up .073 moles of carbon dioxide?
    5·2 answers
  • Which following statements is true?
    9·2 answers
  • Low pressure sodium lamps, like the ones used in parking lots, emit yellow light. If the wavelength is 5.89 × 10 −7m, what is th
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!