Please answer this question according to the image below

Chemistry

1 answer:

AVprozaik [17]2 years ago

3 0

When we show the structure of a molecule, we see the arrangement of atoms in the molecule.

<h3>Structure of molecules</h3>

The structure of a molecule shows the arrangement of atoms in the molecule.

1) There are 24 carbon atoms in the molecule.

2) There are 30 p- orbitals that are involved in pi bonds in the molecule.

3) We need to add 22 lone pairs of electrons

4) We do not need to add any formal positive charge to the molecule.

Learn more about molecules: brainly.com/question/19922822

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Helium on the Moon was found to be 0.420% 2He, 2.75% 3He, and 96.83% 4He. What is the average atomic mass of helium on the Moon?

Tasya [4]

Answer:

Average atomic mass = 3.9 amu

Explanation:

Given data:

Percent abundance of He-2 = 0.420%

Percent abundance of He-3 = 2.75%

Percent abundance of He-4 = 96.83%

Average atomic mass = ?

Solution:

Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100

Average atomic mass = (0.420×2)+(2.75×3) +(96.83×4)/100

Average atomic mass = 0.84 + 8.25 +387.32 / 100

Average atomic mass = 396.41 / 100

Average atomic mass = 3.9 amu.

6 0

3 years ago

A chemist prepares a sample of helium gas at a certain pressure, temperature and volume and then removes all but a fourth of the

Stells [14]

Answer:

e. T₂= 4T₁

Explanation:

Initially, we have a number of moles (n₁) a gas sample at a certain pressure (P), temperature (T₁) and volume (V). We can relate these variables through the ideal gas equation.

P . V = n₁ . R . T₁

where,

R is the ideal gas constant

We can rearrange this equation like:

$T_{1}=\frac{P.V}{n_{1}.R}$