Answer:
n = 11.45 mol
Explanation:
Given data:
Number of moles = ?
Volume of gas = 98 L
Pressure = 2.8 atm
temperature = 292 K
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
2.8 atm × 98 L = n × 0.0821 atm.L/ mol.K × 292 K
274.4 atm.L = n × 23.97atm.L/ mol
n = 274.4 atm.L /23.97atm.L/ mol
n = 11.45 mol
<u>Answer:</u> The correct answer is Option d.
<u>Explanation:</u>
Nuclear fission reaction is defined as the reaction in which 1 heavier nuclei splits into two or more smaller nuclei.
As, nuclear fission reactors require a large amount of energy to split the nucleus, hence it is bombarded with a particle in order to star the reaction.
In a nuclear reaction, a large fissile atomic nucleus like Uranium-235
or Plutonium-239
when absorbs a neutron, it undergoes nuclear fission reaction.
Hence, in the given options, uranium-235 is absorbing a neutron. Therefore, the correct answer is Option d.
Answer:
Enthalpy change = -44.12 kJ
Explanation:
<u>Given: </u>
ΔH°f(C2H6O(l)) = -277.69 kj/mol
ΔH°f(C2H4(g)) = 52.26 kj/mol
ΔH°f(H2O) = -285.83 kj/mol
<u>To determine:</u>
Enthalpy change for the formation of C2H6O
<u>Calculation:</u>
The given reaction is:

The enthalpy change for the reaction is given as;

where n(products) and n(reactants) are the moles of products and reactants
Substituting the appropriate values for n and ΔH°f:
![\Delta H = 1\Delta H^{0}f(C2H6O)-[1\Delta H^{0}f(C2H4)+1\Delta H^{0}f(H2O)]](https://tex.z-dn.net/?f=%5CDelta%20H%20%3D%201%5CDelta%20H%5E%7B0%7Df%28C2H6O%29-%5B1%5CDelta%20H%5E%7B0%7Df%28C2H4%29%2B1%5CDelta%20H%5E%7B0%7Df%28H2O%29%5D)
ΔH = -277.69-(52.26-285.83) = -44.12 KJ
Answer: chlorine gas
Explanation:
mass = 0.508 g volume = 0.175 L
From ideal gas equation.
PV = nRT
(1.0 atm) × (0.175 L) = n × [0.0821 atm L / (mol K)] × [(273.2 + 25.0) K]
n = 1.0 × 0.175 / (0.0821 × 298.2) mol
n = 0.00715 mol
Molarmass= mass/mole
Molar mass of the gas = (0.508 g) / (0.00715 mol) = 71.0 g/mol
The molar mass of Cl₂ (chorine) = 35.5 × 2 g/mol = 71.0 g/mol
Hence, the gas is chlorine.
Answer:
1) The atomic number of this element is 74, because number of protons = atomic number
2) Mass number of this element is 184
Ar=Z+N=74+110=184
3) It isn't a new element. An element with such atomic and mass numbers exists
4) It is Wolfram. Symbol: W
5) Solid
Sorry if I made mistakes. I started learning English recently.