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
Komok [63]
3 years ago
5

What group of elements is most likely to contain elements that will be found in pure nature

Chemistry
2 answers:
lys-0071 [83]3 years ago
5 0

Answer: Option (D) is the correct answer.

Explanation:

Noble gases are the elements that have completely filled orbitals.

For example, electronic configuration of neon is 1s^{2}2s^{2}2p^{6}.

Therefore, they do not react at ordinary conditions with any other element in the atmosphere.

Hence, they exist in pure form in the nature.

Thus, we can conclude that group of noble gases of elements is most likely to contain elements that will be found in pure nature.

Andre45 [30]3 years ago
4 0
The correct answer is D) Noble gases. Hope this helps.
You might be interested in
A 118-ml flask is evacuated and found to have a mass of 97.129 g. when the flask is filled with 768 torr of helium gas at 35 ?c,
Inessa05 [86]
The full question asks to decide whether the gas was a specific gas. That part is missing in your question. You need to decide whether the gas in the flask is pure helium.

To decide it you can find the molar mass of the gas in the flask, using the ideal gas equation pV = nRT, and then compare with the molar mass of the He.

From pV = nRT you can find n, after that using the mass of gass in the flask you use MM = mass/moles.

1) From pV = nRT, n = pV / RT

Data:
V = 118 ml = 0.118 liter
R = 0.082 atm*liter/mol*K
p = 768 torr * 1 atm / 760 torr = 1.0105 atm
T = 35 + 273.15 = 308.15 K

n = 1.015 atm * 0.118 liter / [ 0.082 atm*liter/K*mol  * 308.15K] =0.00472 mol

mass of gas = mass of the fask with the gas - mass of the flasl evacuated = 97.171 g - 97.129 g = 0.042

=> MM =  mass/n = 0.042 / 0.00472 = 8.90 g/mol

Now from a periodic table or a table you get that the molar mass of He is 4g/mol

So the numbers say that this gas is not pure helium , because its molar mass is more than double of the molar mass of helium gas.
7 0
4 years ago
Balance the following equations. Do not include the states of matter.<br><br> (a) C + O2 → CO
krek1111 [17]

Answer:

C + O2 → CO2

Explanation:

C + O2 → CO ----------------- (1)

from equ (1) on reactant side, C has 1 mole, O has 2 moles

from equ (1) on product side, C has 1 mole, O has 1 mole

Thus, to balance the equation, O should have 2 moles

C + O2 → CO2

7 0
3 years ago
Read 2 more answers
Which of these is most likely to create large areas of land subsidence?
Mumz [18]
I think it is Global warming
6 0
3 years ago
Why does hydrogen have a -1 oxidation state in the compound NaH?
ruslelena [56]

your answer will be :

B. <u>Na has a lower</u> <u>electronegativity than H</u>

because Na belongs to alkali metals which are least electronegative (most electro positive) but hydrogen is a non metal, it has higher electronegativity as compared to metals like Sodium (Na).

6 0
3 years ago
The nucleus of unstable _____ of an element will decay leading to emission of radiation.question 1 options:moleculescationsanion
Marta_Voda [28]

Isotopes of same element has different number of neutrons with different masses and having same number of protons and electrons.

Radioactive isotopes are those isotopes which are radioactive in nature. The unstable nucleus results in the radioactivity process and this process will go on until the stable isotope (element) forms.

Thus, the nucleus of unstable isotopes of an element will decay leading to emission of radiation.

6 0
3 years ago
Other questions:
  • El superóxido de potasio, KO2, se emplea en máscaras de respiración para generar
    8·1 answer
  • Is C8H18 an electrolyte or non-electrolyte
    14·1 answer
  • What happens when Ag+ is reacted with Na2CO3
    9·1 answer
  • What is the competition and what are the types of symbiosis?
    6·2 answers
  • If cacl2 is dissolved in water, what can be said about the concentration of the ca2+ ion? view available hint(s) if is dissolved
    13·2 answers
  • Knowing how fossils form, do you think it’s likely that humans will ever piece together a complete fossil record for every speci
    6·2 answers
  • What is the mass in milligrams of 4.30 moles of sodium? use significant figures?
    5·1 answer
  • Which phrases describe the open-ocean zone? Check all that apply.
    5·2 answers
  • If I have 2.90 L of gas at a pressure of 5.00 atm and a temperature of 55.0 C what will be the temperature of the gas if I decre
    14·1 answer
  • Which one has the larger ionization energy ??
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!