Electronic transition moments are defined as the probability for a given excitation energy transition to take place. It should be evident that the transition moment depends upon the spin-orbit coupling of the electrons in both the ground and excited states.
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Answer:
34.28 L ( 1.5*22.4 L)
Explanation:
Calculation of the moles of aluminum as:-
Mass = 55 g
Molar mass of aluminum = 26.981539 g/mol
The formula for the calculation of moles is shown below:
Thus,
According to the reaction:-
4 moles of aluminum react with 3 moles of oxygen gas
1 mole of aluminum react with moles of oxygen gas
2.0384 moles of aluminum react with moles of oxygen gas
Moles of oxygen gas = 1.5288 moles
At STP,
Pressure = 1 atm
Temperature = 273.15 K
Using ideal gas equation as:
where,
P is the pressure
V is the volume
n is the number of moles
T is the temperature
R is Gas constant having value = 0.0821 L.atm/K.mol
Applying the equation as:
1 atm × V = 1.5288 mol × 0.0821 L.atm/K.mol × 273.15 K
⇒V = 34.28 L ( 1.5*22.4 L)
The best way to represent the concentration of a 1.75 M K2CrO4 solution is 1.75% K2CrO4 (option A).
<h3>What is molarity?</h3>
Molarity is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.
The molarity is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution.
The molarity is measured in mol/L or M, hence, it can be said that the molarity of a solution is 0.1M.
However, the concentration of a solution is best represented by using %. In accordance with this question, the best way to represent the concentration of a 1.75 M K2CrO4 solution is 1.75% K2CrO4.
Learn more about molarity at: brainly.com/question/8732513
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Answer:
67.0 L
Explanation:
Step 1: Given data
- Pressure: 1 atm (standard pressure)
- Temperature: 273.15 K (standard temperature)
Step 2: Calculate the volume occupied by 2.99 moles of C₃H₈ at STP
C₃H₈ is a gas. If we assume ideal behavior, 1 mole of C₃H₈ at STP occupies 22.4 L.
2.99 mol × 22.4 L/1 mol = 67.0 L
The answers to include the following below:
- Hot water has more energy than cold water because it has more internal energy present in it.
- The relationship between temperature and the movement of particles is a direct one which means that as temperature increases, the movement of particles also increases and vice versa.
- The temperature of a substance is directly proportional to the average kinetic energy of the substance which makes their relationship a direct one.
- Water is referred to as pure substance because it contains only one type of molecule.
<h3>What is Temperature?</h3>
This is described as the measure of the hotness or coldness of a substance and is influenced by heat energy.
Temperature has a direct relationship with average kinetic energy and movement of particles which means that an increase in one variable will also lead to a corresponding increase in the other.
This is the therefore the reason why the above answers are correct and the most appropriate.
Read more about Temperature here brainly.com/question/2331658
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