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Tems11 [23]
2 years ago
11

Consider 3.01*10^24 molecules of oxygen (atomic mass is 16.0 g/mole) in a container at a temperature of 22.0 degrees celsius. If

this gas can be considered as an ideal gas, calculate: 1.The Average translational kinetic energy of the gas. 2.The average translational kinetic energy per molecule 3. The root mean square speed of a gas molecule. 4. The most probable speed of the gas molecules.
Chemistry
1 answer:
Sergeeva-Olga [200]2 years ago
8 0

Answer:

See explanation

Explanation:

The tranlational energy of a molecule is obtained by; ET =3/2 kT

T is the temperature while k is the Boltzmann constant (k)

The Boltzmann constant (kB) relates temperature to energy.

Substituting values;

ET = 3/2 (1.3807 × 10−23 joule/K) * (22 + 273)K

ET = 6.11 * 10^-21 J

The average translational kinetic energy per molecule=  6.11 * 10^-21 J/ 3.01*10^24 molecules = 2.03 * 10^-45 J per molecule

<u>vrms = √</u>3RT/M

vrms = √3 * 8.314 * 295/32

vrms = 15.2 m/s

Most probable speed =  √2RT/M

Most probable speed = √2 * 8.314 * 295/32

Most probable speed = 12.38 m/s

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PLEASE HELP!
Tanzania [10]
Molar mass:

KCl = 74.55 g/mol

KClO3 = 122. 55 g/mol

  <span>Calculation of the mass of KClO3 :</span>

<span>2 KClO3 =  2 KCl + 3 O2</span>

2* 122.55 g KClO3 ------------------ 2 * 74.55 g KCl
mass KClO3 ?? --------------------- 25.6 g KCl

mass KClO3 = 25.6 * 2 * 122.55 / 2 * 74.55

mass KClO3 = 6274.56 / 149.1

mass = 42.082 g of  KClO3

Therefore:

1 mole KClO3 ---------------------- 122.55 g
?? moles KClO3 ------------------- 42.082 g

moles KClO3 = 42.082 * 1 / 122.55

moles KClO3 = 42.082 / 122.55

=> 0.343 moles of KClO3


Answer C

hope this helps!

3 0
3 years ago
5) Determine the mass if lithium hydroxide that is produced when 12.87 g of lithium
netineya [11]

Answer: 26.54 grams

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of lithium nitride}=\frac{12.87g}{34.83g/mol}=0.369moles

Li_3N+3H_2O\rightarrow 3LiOH+NH_3  

Li_3N is the limiting reagent as it limits the formation of product and H_2O is the excess reagent

According to stoichiometry :

As 1 moles of Li_3N give = 3 moles of LiOH

Thus 0.369 moles of O_2 give =\frac{3}{1}\times 0.369=1.108moles  of LiOH

Mass of LiOH=moles\times {\text {Molar mass}}=1.108moles\times 23.95g/mol=26.54g

Thus  26.54 g of LiOH will be produced from the given mass.

4 0
3 years ago
MgCl2(at)+Br2(l)=MgBr2(at)+Cl2(g)<br><br> how do you write in a word equation
kotykmax [81]

aqueous Magnesium Chloride reacts with liquid Bromide to form aqueous Magnesium Bromide and Chlorine gas

6 0
2 years ago
What is created when an acid is mixed with a base?
Arturiano [62]

Answer:

If you mix equal amounts of a strong acid and a strong base, the two chemicals essentially cancel each other out and produce a salt and water. Mixing equal amounts of a strong acid with a strong base also produces a neutral pH (pH = 7) solution.

8 0
3 years ago
11. What is the maximum number of electrons that an atomic orbital can contain?
Arada [10]

Answer:

2

Explanation:

Each orbital can hold two electrons. One spin-up and one spin-down.

6 0
3 years ago
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