Seans formula did not have any atmos of oxygen

What ion charge patterns are in the periodic table

Rzqust [24]

the elements in groups1a, 2a, 3a have positive charges according to their group numbers

8 0

3 years ago

The argon atoms are excited into an excited state before emitting the 488.0 nm laser. It is known that the energy of the first i

Jobisdone [24]

Answer:

Explanation:

Given that:

The argon atoms are excited into an excited state before emitting the 488.0 nm laser.

the energy of the first ionization energy of argon is 1520 kJ mol-1.

SInce 1 eV = 96.49 kJ/mol

Therefore, the energy of the first ionization energy of argon in eV is = ( 1520/ 96.49) eV

= 15.75 eV

To find where the energy level of the excited state lies below the vacuum energy level, let's first determine, the energy liberated by using planck expression.

$E = \dfrac{hc}{\lambda}$

$E = \dfrac{6.6 \times 10^{-34} \times 3 \times 10^8}{488 \times 10^{-9}}$

$E = \dfrac{1.98 \times 10^{-25}}{488 \times 10^{-9}}$

$E =4.057 \times 10^{-19} \ J$

Converting Joules (J) to eV ; we get,

$E =\dfrac{4.057 \times 10^{-19}}{1.6 \times 10^{-19}}$

E = 2.53 eV

The energy levels of the first exited state = -13.223 eV

8 0

3 years ago

An ionic compound has a solubility of 30 g per 100 mL of water at room temperature. A solution containing 70 g of the compound i

Llana [10]

Answer: A. unsaturated.

Explanation:

Unsaturated solution is defined as the solution in which more solute particles can be dissolved in the solvent.

Saturated solution is defined as the solution in which no more solute particles can be dissolved in the solvent.

Supersaturated solution is defined as the solution in which more amount of solute particles is present than the solvent particles.

Given: Solubility = 30g/100ml

If 100 ml can dissolve ionic compound = 30 g

300 ml can dissolve ionic compound = $\frac{30}{100}\times 300=90g$

Thus solubility is 90g/300 ml and dissolved salt is only 70 g , the solution is said to be unsaturated.

3 0

3 years ago

Which statement is true?

Murrr4er [49]

The last Most rocks are made up of a mixture of minerals. Most rocks are made up of a mixture of minerals.is correct because rocks contain a combination of minerals not just one

5 0

3 years ago

Read 2 more answers

Who is responsible for the impacts of overfishing?

GarryVolchara [31]

Answer:

Japan, China, the U.S., Indonesia, Chinese Taipei and South Korea have been named by Pew Charitable Trusts on a “shame list” of countries responsible for overfishing tuna in the Pacific. According to Pew, the “Pacific 6” are responsible for 80 percent — 111,482 metric tons in 2011 — of the annual catch of bigeye tuna.

Hope it will help you

7 0

3 years ago