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3 years ago

What is the chemical composition of aragonite?

Chemistry

1 answer:

Alexandra [31]3 years ago

4 0

Calcium carbonate CaCO3<span>

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What existed during the mesozoic era

Ilia_Sergeevich [38]

Mezoic era began 252m years ago and ended 6.6m years ago.
It was a time of geological and biological transition. During this era the continents began to drift to their present configuration.
3 of the largest mass extinction occurred at this era. One which include the dinosaurs.
I hope this helped. :)

3 0

3 years ago

Pls help, WILL MARK BRAINLIEST FOR THE CORRECT ANSWER!!!!

Nitella [24]

Answer:

The answer is D. Substances Y and Z would react to replace substance W, and the position of equilibrium would shift to the left.

Explanation:

PLZ BRAINLIEST'!!!

6 0

3 years ago

Read 2 more answers

Calculate the energy of the green light emitted, per photon, by a mercury lamp with a frequency of 5.49x10 to the 14 th power Hz

Nuetrik [128]

For this problem, we have to use the Planck's equation.

E = hv
where
E is the energy
h is Planck's constant equal to 6.626×10⁻³⁴ J·<span>s
v is the frequency in Hz or s</span>⁻¹<span>

Applying the equation, the answer would be:

E = (</span>6.626×10⁻³⁴ J·s)(5.49×10¹⁴ s⁻¹)
<em>E = 3.64×10⁻¹⁹ J</em>

4 0

3 years ago

Here is the electron configuration for Argon. What does the coefficient 3 in 3s2 tell us?

topjm [15]

The coefficient 3 represents the electron shell

<h3>Further explanation </h3>

In an atom there are levels of energy in the shell and sub shell

This energy level is expressed in the form of electron configurations.

Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub-shells in the shell of an atom, namely s, p, d and f. The maximum number of electrons for each sub shell is

• s: 2 electrons

• p: 6 electrons

• d: 10 electrons and

• f: 14 electrons

Charging electrons in the sub shell uses the following sequence:

Argon is a noble gas element with the symbol Ar with atomic number 18 and mass number 40

Electron configuration: [Ne] 3s²3p⁶

The coefficient 3 represents the electron shell, which is denoted as the quantum number n

This shell consists of 3 sub shells namely 3s, 3p and 3d which have a maximum of 18 electrons (3s = 2 electrons, 3p = 6 electrons and 3d = 10 electrons)

3 0

3 years ago

A balloon is filled with a gas and has a volume of 1.79 L at 2.82 atm pressure. What will its volume be if

Black_prince [1.1K]

Answer:

<h2>The answer is 0.95 L</h2>

Explanation:

In order to find the volume when the pressure is changed to 5.30 atm we use Boyle's law which is

$P_1V_1 = P_2V_2 \\$

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

Since we are finding the final volume

$V_2 = \frac{P_1V_1}{P_2} \\$

From the question

P1 = 2.82 atm

V1 = 1.79 L

P2 = 5.30 atm

So we have

$V_2 = \frac{2.82 \times 1.79}{5.3} \\ = 0.9524150943...$

We have the final answer as

Hope this helps you

6 0

3 years ago