The average kinetic energy of water molecules is greatest in which of these samples?(1) 10 g of water at 35°C(2) 10 g of water a
2 answers:
Answer : The correct option is, (2) 10 g of water at 55°C
Explanation :
Average kinetic energy of the gas particle is directly proportional to the temperature of the gas particle.
Formula used :
where,
R = Gas constant
T = temperature
= Avogadro's number
From this we conclude that the kinetic energy is directly proportional to the temperature where 'R' and are constant. That means kinetic energy depends only on the temperature not on the mass.
(Higher the temperature, higher will be the kinetic energy)
Hence, the average kinetic energy of water molecules is greatest in 10 g of water at 55°C.
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Explanation:
Formula according to the radius ratio rule is as follows.
= 0.397
According to the radius ratio rule, as the calculated value is 0.397 and it lies in between 0.225 to 0.414. Therefore, it means that the type of void is tetrahedral.
Thus, we can conclude that the given compound is most likely to adopt closest-packed array with lithium ions occupying tetrahedral holes.
Specific heat capacity (c) of a material is related to the Energy Absorbed (Q), mass of the material (m) and the change in temperature (T) by the following equation:
Substituting the values of Q, m and T in the above equation, we get:
So the specific heat capacity of the metal with given conditions will be 0.129 J/g.K
Substituting the values of Q, m and T in the above equation, we get:
So the specific heat capacity of the metal with given conditions will be 0.129 J/g.K
The question is incomplete. Here is the complete question.
The photoelectron spectroscopy is shwon below.
(a) Based on the photoelectron spectrum, identify the unknown element and write its electron configuration.
(b) Consider the element in the periodic table that is directly to the right of the element identified in part (a). Would the 1s peak of this element appear to the left of, the right of, or in the same position as the 1s peak of the element in part (a)? Explain your reasoning.
Answer and Explanation: <u>Photoelectron</u> <u>Spectroscopy</u> is a method of determinining the relative energy of electrons in atoms and molecules.
It is based on the <em>photoelectric effect: </em>when a radiation energy incides on a substance, an electron is ejected from it. If we know the kinetic energy of the ejected electron, known as photoelectrons, and the energy of the incident radiation, it is possible to find the energy of the electron in the substance.
The energy needed to eject an electron from the sample is called <em>Binding Energy</em> and in an atom, depends on which shell the electron is: valence eletrons (outermost shell), binding energy is lower; core eletrons (innermost shell), binding energy is highest.
In the graph, vertical axis shows 5 peaks for different energies. The peak closer to the origin, the leftmost peak, correspond to the 1s subshell, since their are closest to the nucleus, and so, has the highest binding energy.
Following from left to the right, we noticed:
- First, second and fourth peaks has the same height;
- Third peak's height is 3x higher than 1st, 2nd and 4th;
- Fifth peak is one unit higher than first, second and fourth;
(a) Then, we can conclude the eletron configuration of the element is
which is Phosphorus with atomic number of 15.
(b) The element to the right of element P is Sulfur (S). The peak 1s of sulfur will appear in the same position as the 1s peak of Phosphorus, because the elements in the Periodic Table are grouped according to certain properties. Elements in the same horizontal line are elements in the same period, which one of the characteristics is they have the same total number of electron shells.
<u>Answer:</u> The volume of CO formed is 254.43 L.
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
Given mass of = 444 g
Molar mass of = 170.73 g/mol
Putting values in above equation, we get:
For the given chemical reaction:
By stoichiometry of the reaction:
1 mole of nickel tetracarbonyl produces 4 moles of carbon monoxide.
So, 2.60 moles of nickel tetracarbonyl will produce = of carbon monoxide.
Now, to calculate the volume of the gas, we use ideal gas equation, which is:
PV = nRT
where,
P = Pressure of the gas = 752 torr
V = Volume of the gas = ? L
n = Number of moles of gas = 10.4 mol
R = Gas constant =
T = Temperature of the gas =
Putting values in above equation, we get:
Hence, the volume of CO formed is 254.43 L.