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3 years ago

9

What is the atomic number of an atom that has 2 electrons 3 protons and 4 neutrons

1 answer:

zalisa [80]3 years ago

4 0

Hi,
The atomic number of an element depends on how many protons there are in one atom of that element. If the atom has 3 protons, its atomic number will be 3.

Hope this helps! If my answer was not clear enough or you’d like further explanation please let me know.

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3 years ago

Explain what keeps the electrons confined in the space surrounding the nuleus

aleksklad [387]

Answer:

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Calculate the mass of nitrogen dissolved at room temperature in an 86.0 L home aquarium. Assume a total pressure of 1.0 atm and

Andrew [12]

Answer:

Mass of nitrogen gas dissolved= 1.1732 grams

Explanation:

According to Dalton's Law of partial pressure:

$P_{N_2}=P_{Total}X_{N_2}$

Where,

$P_{N_2}$ is the partial pressure of nitrogen

$P_{Total}$ is the Total pressure

$X_{N_2}$ is the mole fraction of nitrogen

Given :

Total pressure = 1.0 atm

Mole fraction of nitrogen = 0.78

Partial pressure of nitrogen:

$P_{N_2}=1.0\times 0.78 atm$

<u>Partial pressure of nitrogen = 0.78 atm</u>

According to Henry's law:

Solubility = Henry's constant (k)×Partial pressure

k = 6.26×10⁻⁴ mol/L-atm

Thus,

<u>Solubility of nitrogen = 6.26×10⁻⁴ mol/L-atm×0.78 atm = 4.8828×10⁻⁴ mol/L</u>

Given: Volume = 86.0 L

So, Moles of nitrogen gas dissolved:

Moles = Solubility (Concentration dissolved)×Volume

<u>Moles = 4.8828×10⁻⁴ mol/L×86.0 L = 0.0419 moles</u>

Also,

$moles=\frac{Mass(m)}{Molar\ mass (M)}$

$Mass\ of\ nitrogen=moles\times {Molar\ mass}$

Molar mass of nitrogen gas = 28 g/mol

So,

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Explanation:

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3 years ago

Read 2 more answers

When naming acids such as HCl, HBr, and HI, the prefix "hydro-" is added and the "ine" of the element is replaced with which of

liberstina [14]

Answer:

a. "-ic"

Explanation:

The correct answer is a. "-ic".

For example:

For HCl, the name is Hydrochloric acid. As you can see, the suffix "-ine" of the element (originally chlor<em>ine</em>) is changed to "-ic".

Following the same logic, the name for HBr is Hydrobromic acid; and the name for HI is Hydroiodic acid.

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3 years ago