Answer : Option 4) Region of the most probable electron location.
Explanation : As per the electron cloud model of the atom, an orbital is a region where the probability of finding an electron is highest. According to this model which was used to identify the probable location of the electrons when they go around the nucleus of an atom.
This electron cloud model was different from the older Bohr atomic model by Niels Bohr.
Hey there!:
E = energy gained (input) - energy lost (output)
∆E = 150J - 115 J
∆E = 35 J
Hope that helps!
The change in internal energy (?E) of the system is 35 J based on the first law of thermodynamics.
This problem can be solved using the first law of thermodynamics, which states that the change in internal energy (?E) of a system is equal to the heat added to it (Q) minus the work done by it (W) - this is expressed as ?E = Q - W.
In this particular case, the system loses 115 J of heat, so Q equals -115 J (as it's lost, it's negative), and 150J work is performed on the system which equals +150 J (as work is done on it, it is positive). Therefore, substituting these values into the formula, we get: ?E = -115 J - (-150 J) = 35 J:
So, the change in internal energy of the system is 35 J.
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a.) -133 kJ
b.) +133 kJ
c.) +133,170 kJ
d.) -6.65 x 10^-3
The complete question is attached in the attachment.
Out of the given options, Selenium is the one which is most brittle element.
As selenium is a metalloid or a crystalline non metal which is lustrous and is ductile in nature and is highly brittle in nature.
Selenium is the most brittle out of all the other elements
According to the mole concept, there are 76.94 g in 2.4 moles of sulfur atoms.
Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
Mass is found out by number of moles by formula , mass=number of moles×molar mass
Substitution in above formula gives, mass=2.4×32.06=76.94 g
Thus, there are 76.94 g in 2.4 moles of sulfur.
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(2) Chlorine molecules have strong covalent bonds.
(3) Chlorine molecules have weak intermolecular forces of attraction.
(4) Chlorine molecules have strong intermolecular forces of attraction.