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4 years ago

Write the symbol are element X, which has 22 electrons and 22 neutrons.

Chemistry

2 answers:

Margaret [11]4 years ago

6 0

the answer is titanium, look on periodic table :D

Snezhnost [94]4 years ago

3 0

<u>Answer:</u> The isotopic representation of the element is $_{22}^{44}\textrm{Ti}$

<u>Explanation:</u>

Atomic number is defined as the number of protons or number of electrons that are present in a neutral atom.

Atomic number = number of protons = number of electrons

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons

The isotopic representation of an atom is: $_Z^A\textrm{X}$

where,

Z = Atomic number of the atom

A = Mass number of the atom

X = Symbol of the atom

We are given:

Number of electrons = 22 = Number of protons

Number of neutrons = 22

Mass number = 22 + 22 = 44

Hence, the isotopic representation of the element is $_{22}^{44}\textrm{Ti}$

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Arrange elements in decreasing order of the number of valence electrons

meriva

Answer:

It’s voice and a

Explanation:

3 0

3 years ago

Consider the reaction: CO2(g) + CCl4(g) ⇌ 2 COCl2(g) ΔG° = 46.9 kJ Under the following conditions at 25 oC: LaTeX: P_{CO_2}P C O

Mamont248 [21]

Answer : The value of $\Delta G_{rxn}$ is, $-47.0kJ/mole$

Explanation :

The formula used for $\Delta G_{rxn}$ is:

$\Delta G_{rxn}=\Delta G^o+RT\ln K_p$ ............(1)

where,

$\Delta G_{rxn}$ = Gibbs free energy for the reaction

$\Delta G_^o$ = standard Gibbs free energy = 46.9 kJ

R = gas constant = 8.314 J/mole.K

T = temperature = $25^oC=273+25=298K$

$K_p$ = equilibrium constant

First we have to calculate the value of $K_p$ .

The given balanced chemical reaction is,

$CO_2(g)+CCl_4(g)\rightarrow 2COCl_2(g)$

The expression for reaction quotient will be :

$K_p=\frac{(p_{COCl_2})^2}{(p_{CO_2})\times (p_{CCl_4})}$

In this expression, only gaseous or aqueous states are includes and pure liquid or solid states are omitted.

Now put all the given values in this expression, we get

$K_p=\frac{(0.653)^2}{(0.459)\times (0.984)}$

$K_p=0.944$

Now we have to calculate the value of $\Delta G_{rxn}$ by using relation (1).

$\Delta G_{rxn}=\Delta G^o+RT\ln K_p$

Now put all the given values in this formula, we get:

$\Delta G_{rxn}=-46.9kJ/mol+(8.314\times 10^{-3}kJ/mole.K)\times (298K)\ln (0.944)$

$\Delta G_{rxn}=-47.0kJ/mol$

Therefore, the value of $\Delta G_{rxn}$ is, $-47.0kJ/mole$

3 0

3 years ago

Give the number of particles of each element in Na2SO4, sodium sulfate, a drying agent.

aleksklad [387]

Sodium, Sulphur, and Oxygen

4 0

4 years ago

A nickel is about 2 millimeters thick, or 2/1,000 of a meter. How many nanometers is this

Lina20 [59]

Go to a calculator and find that 2 millimeters is 2e+6 nanometers.

Hoped I helped!

4 0

3 years ago

BRAINLIESTTT ASAP!! PLEASE HELP ME :)

horsena [70]

Answer: Hard working,satisfied. (i think)

~Please mark as brainiest~

3 0

4 years ago

Read 2 more answers