All categories

3 years ago

The most abundant trace gas in the atmosphere is _____. neon hydrogen argon helium

Chemistry

2 answers:

ad-work [718]3 years ago

4 0

The answer is C, argon.

zhenek [66]3 years ago

3 0

<em>Answer:</em>

Argon

<em>Explain:</em>

The most abundant gas in the atmosphere is Nitrogen (78.09%), The 2nd most abundant is oxygen (20.94%) and third one is argon (0.93%) and 4th one is CO2 (0.04%). While all others are in small amount like traces.

You might be interested in

The pH of a solution is 2.0. Which statement is correct?

Natalka [10]

Answer:

The relationship of pH and concentration of H+ ion is pH = -lg[H+]. So the concentration of H+ is 10^(-2). And [OH-][H+]=10^(-14). pOH + pH = 14. So the right answer is A.

6 0

3 years ago

Read 2 more answers

How many valence electrons does this atom have ? 1s^2 2s^2 2p^6 3s^2

tangare [24]

Answer

there is 2 electrons on that atoms

Explanation:

5 0

3 years ago

How many atoms are there in 7.6 moles of Iron?

Harlamova29_29 [7]

Answer:

45.77 × 10²³ atoms

Explanation:

Given data:

Number of moles of iron = 7.6 mol

Number of atoms = ?

Solution:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

7.6 mol × 6.022 × 10²³ atoms / 1 mol

45.77 × 10²³ atoms

5 0

3 years ago

Energy must be added to an atom to move a electron from a lower to a higher energy level. This is known as ___________

Phoenix [80]

Answer:

The excitation energy

Explanation:

Excitation energy is the energy needed move an electron from a lower energy level (usually the ground state) to one of higher energy (an excited state).

6 0

4 years ago

I need help fast thx

Free_Kalibri [48]

I'm guessing you have to balance these.
I took a picture of my working out.

Answer to the first one = 2HCl+CaCO3=CaCl2+H20+CO2
So basically just add a big 2 in front of the first HCl

Answer to second one = 2Ni + O2 = 2NiO
So basically in this one just add a big 2 in front of both of the Ni

6 0

3 years ago