El volumen de un gas en un recipiente cerrado es de 3.5 litros a una temperatura de 25oC y una atmósfera constante de presión. ¿
1 answer:
Answer:
El volumen del gas en el recipiente es 3.29 L si se disminuye la temperatura a 7°C
Explanation:
La Ley de Charles es una ley de los gases que relaciona el volumen y la temperatura de una cierta cantidad de gas a presión constante.
Esta ley establece que el volumen es directamente proporcional a la temperatura del gas. Es decir que si la temperatura aumenta, el volumen del gas aumenta, mientras que si la temperatura del gas disminuye, el volumen disminuye.
Matemáticamente, si la cantidad de gas y la presión permanecen constantes, el cociente entre el volumen y la temperatura siempre tiene el mismo valor:
Suponiendo un cierto volumen de gas V1 que se encuentra a una temperatura T1 al comienzo del experimento, al variar el volumen de gas hasta un nuevo valor V2, entonces la temperatura cambiará a T2, y se cumplirá:
En este caso, sabes:
- V1= 3.5 L
- T1= 25 °C=298 °K (siendo 0°C=273°K)
- V2=?
- T2=7 °C=280 °K
Reemplazando:
Y resolviendo obtienes:
V2= 3.29 L
<u><em>El volumen del gas en el recipiente es 3.29 L si se disminuye la temperatura a 7°C</em></u>
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When ammonia is reacted with HCl it abstracts proton from acid and forms Ammonium Ion and Chloride Ion.
NH₃ + HCl → ⁺NH₄ + Cl⁻ (simply Written NH₄Cl)
Structure,
The structure of Ammonium Chloride is among those structures which contains all three types of bonding's, i.e.
Ionic Bond
Covalent Bond
Coordinate Covalent Bond
Three Hydrogen atoms previously bonded with Nitrogen are covalent in nature. The new incoming proton from HCl forms co-ordinate covalent bond with Nitrogen and Chloride Ion containing negative charge make Ionic Bond with the positive Ammonium Ion. In question, if the line between Nitrogen and Chlorine atom is assumed covalent then it is incorrect. Structure is shown below,
NH₃ + HCl → ⁺NH₄ + Cl⁻ (simply Written NH₄Cl)
Structure,
The structure of Ammonium Chloride is among those structures which contains all three types of bonding's, i.e.
Ionic Bond
Covalent Bond
Coordinate Covalent Bond
Three Hydrogen atoms previously bonded with Nitrogen are covalent in nature. The new incoming proton from HCl forms co-ordinate covalent bond with Nitrogen and Chloride Ion containing negative charge make Ionic Bond with the positive Ammonium Ion. In question, if the line between Nitrogen and Chlorine atom is assumed covalent then it is incorrect. Structure is shown below,
Answer:
108.6 g
Explanation:
- 2NaN₃(s) → 2Na(s) + 3N₂(g)
First we use the <em>PV=nRT formula</em> to <u>calculate the number of nitrogen moles</u>:
- P = 1.00 atm
- V = 56.0 L
- n = ?
- R = 0.082 atm·L·mol⁻¹·K⁻¹
- T = 0 °C ⇒ 0 + 273.2 = 273.2 K
<u>Inputting the data</u>:
- 1.00 atm * 56.0 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 273.2 K
- n = 2.5 mol
Then we <u>convert 2.5 moles of N₂ into moles of NaN₃</u>, using the <em>stoichiometric coefficients of the balanced reaction</em>:
- 2.5 mol N₂ *
= 1.67 mol NaN₃
Finally we <u>convert 1.67 moles of NaN₃ into grams</u>, using its <em>molar mass</em>:
- 1.67 mol * 65 g/mol = 108.6 g
There are 0.138 gram copper could be electroplated on the cathode in an experiment where an average of 200 ma was passed through the cell for 35 minutes .
Calculation ,
Given ; Current passed through copper ( I ) = 200 mA = 200× A
time in second = 35 minutes×60 = 2100 sec
Current ( I )= Q/t
Q =It = 200× A × 2100 sec = 420 C
96500 C of charge = 1 mole
420 C of charge = 1 mole ×420 C/ 96500 C = 0.00435 mol
In , the valancy of Cu is +2 .
2 moles of electron are required for the decomposition of 1 mole of Cu on the cathode .
0.00435 mol of electron are required for the decomposition of Cu = 1mol × 0.00435 mol/2 = 0.002175 mol of Cu
Number of moles of Cu = given mass / molar mass
Mass of Cu = Number of moles of Cu × molar mass = 0.002175 ×63.546
Mass of Cu = 0.138 gram
Therefore , mass of copper is 0.138 gram
To learn more about copper
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