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4 years ago

Select the ions below which possess the electron configuration of a noble gas.

1 answer:

5 0

O2- stands for superoxide anion, S2- stands for sulfide anion, H- stands for hydrogen anion, and Na+ stands for sodium this all ions possess the electron configuration of noble gas because each of them (O2-, S2-, H-, and Na+) has a full outer shell.

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If 22.5 mol of an ideal gas occupies 30.5 L at 447 K, what is the pressure of the gas?

Fantom [35]

Answer:

P = 27.07 atm

Explanation:

Given that,

The number of moles, n = 22.5 mol

Volume, V = 30.5 L

Temperature, T = 447 K

We need to find the pressure of the gas. The ideal gas law is as follows :

$PV=nRT\\\\P=\dfrac{nRT}{V}$

R = 0.0821 L-atm/mol-K

Put all the values,

$P=\dfrac{22.5\times 0.0821\times 447}{30.5}\\\\P=27.07\ L$

So, the pressure of the gas is 27.07 atm.

8 0

3 years ago

A gas is confined in a 0.3m diameter cylinder by a piston, on which rests a weight. The mass of the piston is 85 kg. The local a

iris [78.8K]

Explanation:

Force applied on the gas will be as follows.

$F_{gas} = F_{atm} + (m + M) g$

As, F = pressure × area. Hence, calculate the forces as follows.

$F_{gas}$ = pressure × area

= $1.4 \times 10^{5} Pa \times \pi \times (\frac{0.3}{2})^{2}$

= $1.979 \times 10^{4}$ N

$F_{atm}$ = pressure × area

= $1.0133 \times 10^{5} \times \pi \times (\frac{0.3}{2})^{2}$

= $1.432 \times 10^{4}$ N

$F_{gas}$ - $F_{atm}$ = $5.47 \times 10^{3}$ N

Substituting the calculated values into the above formula as follows.

$F_{gas} = F_{atm} + (m + M) g$

$F_{gas} - F_{atm}$ = (m + M) g

$5.47 \times 10^{3}$ N = $(m + 85) \times 9.8$

$5.47 \times 10^{3}$ N = $9.8m + 833$

m = 472.76 kg

Thus, we can conclude that the mass is 472.76 kg.

5 0

4 years ago

How many protons are there in a metallic ion which has 18 electrons

aev [14]

I am pretty sure that electron amounts and proton amounts are the same.

6 0

3 years ago

Plzzzz Help!!!!

Alona [7]

Explanation:
In order to calculate the molarity of a solution, you need to know two things
the number of moles of solute present in solution
the total volume of the solution
The problem provides you with a
24.7-g
sample of potassium chloride,
KCl
, and a total volume of a solution of
500. mL
.
In order to find the number of moles of potassium chloride, your solute, use the compound's molar mass, which as you know tells you the mass of one mole of potassium chloride

5 0

3 years ago

30 POINTS TO WHOEVER CAN FIGURE OUT!!!! Which molecule is most responsible for the adverse effects of pollution and deforestatio

Semenov [28]

Answer:

B, carbon dioxide

Explanation:

It is released through many human activities such as burning fossil fuels, deforestation, land use, and even respiration.

7 0

3 years ago