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True [87]
3 years ago
6

What is the first quartile of the following data set?

Chemistry
1 answer:
Darina [25.2K]3 years ago
6 0

Answer:

hdhhdhhdhgdgdvsgsvsvvsvsvsvsvs

Explanation:

hdhbdbdbdbdbdbxbxbxvxbxbbxbxvxvxvxv

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What has the greatest amount of gravitational pull of the solar system
mrs_skeptik [129]

Answer:

The sun has nearly 99.98% of the mass of the Solar System, which classifies it as having the greatest amount of gravity.

Explanation:

3 0
3 years ago
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If you make an electromagnet using a battery circuit and a steel nail, how can you increase its magnetic strength?
kotegsom [21]

Answer:

C I think

Explanation:

I learned this last year

4 0
3 years ago
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does anyone know how to find the electron configuration of an element without using a periodic table?? group and period is alrea
snow_lady [41]
For that you have to use the Aufbau principle

For example, writing the electronic configuration of Fe(28)

I recommend that you memorize the aufbau principle. Once you learn it, you don’t need anything else except the atomic number of the element to write it’s electronic configuration.
8 0
2 years ago
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How many moles of copper are present in 75.0g Cu? Show your complete calculation and give the answer in the correct number of si
velikii [3]

Answer:

The answer to your question is 1.2 moles of copper

Explanation:

Data

mass of copper = 75 g

moles = ?

Process

1.- Look in the periodic table for the atomic mass of copper.

Atomic mass = 63.55 g/mol

2.- Use proportions to determine the moles of copper in 75 g

                          63.55 g of copper -------------------- 1 mol

                          75 g of copper       --------------------  x

Use cross multiplication

                          x = (75 x 1) / 63.55

                          x = 75 / 63.55

                          x = 1.18 moles ≈ 1.2 moles of copper

3 0
4 years ago
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Which transition by an electron will release the greatest amount of energy? answer soon please ​
alexira [117]

Answer:

When electron jumps from high energy level to lower energy level.

Explanation:

The elctronic transition from one energy level to another energy level within the atom, always involve energy transitions.

The energy released or absorbed by electronic transition is always discrete and is called as " Photon". It means when electron jumps from when energy level to another energy level the energy released or absorbed is treated as photon emitted or absorbed.

When an electron jumps from higher energy level to a lower energy level, a photon of specific wavelength and specific energy is emitted in other words we can say that energy is released or emitted.

The energy of photon emitted or absorbed is easily calculated using Rydberg Formula which is simply the energy difference between the two energy levels and is given as under;

Ephoton = Eo ( 1 / n1^2 - 1 / n2 ^ 2)

In the above formula n1 is the initial energy level of electron and n2 is the final energy level of electron.

Eo = 13.6 eV ( Here "o" in Eo is in subscripts)

In n1 and n2 1 and 2 are in the subscripts.

^ represents that the disgits after them are exponents.

So by just putting the values of energy levels n1 and n2 we can easily calculate the value of energy of photon ( energy due to electronic transition) and compare the results that which transition will give high energy photon and which will give low energy photon.

3 0
4 years ago
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