Answer:
See explanation
Explanation:
-0.7ev = -13.6/n^2
n= 4
4--->1
4--->3, 3---> 2, 2--->1
E4-E1= -13.36(1/4^2 - 1/1^2) = 12.53 eV
E4-E3 = -13.36 (1/4^2 - 1/3^2) = 0.65 ev
E3-E2 = -13.36 (1/3^2 - 1/2^2) = 1.86 eV
E2- E1 = -13.6 ( 1/2^2 - 1/1^2) = 10.02 ev
a)
λ= 6.6 × 10^-34 × 3 × 10^8/12.53 × 1.6 × 10^-19
λ= 19.8 × 10^-26/20.048 ×10^-19
λ= 9.9 × 10^ -8 m
b)
λ= 6.6 × 10^-34 × 3 × 10^8/0.65 × 1.6 × 10^-19
λ= 19.8 × 10^-26/1.04 ×10^-19
λ= 19.0 × 10^ -7 m
<span>Recrystallization
is another method of purification of solids in which an impure solid is
crystallize repeatedly to obtain amore pure solid and a larger one. Ethanol is
better suited as solvent in recrystallization of benzene than acetone because
it becomes soluble with benzene at a higher temperature. Ethanol is non polar
and may react well with benzyl but acetone are is non polar. A difference in
their polarity, especially in heating both benzyl and the solvent can lead to
more impurities that cannot be removed.</span>
Answer:
When the pressure increases to 2.35 atm, the temperature will increase to 378 K
Explanation:
Step 1: Data given
The initial pressure = 1.82 atm
The initial temperature = 293 K
The pressure will be increased to 2.35 atm
Step 2: Calculate the new temperature
P1/T1 = P2/T2
⇒with P1 = the initial pressure = 1.82 atm
⇒with T1 = the initial temperature = 293 K
⇒with P2 = the increased pressure = 2.35 atm
⇒with T2 = the new temperature = TO BE DETERMINED
1.82atm / 293 K = 2.35 atm / T2
T2 = 2.35 atm / (1.82 atm/293 K)
T2 = 2.35 / 0.0062116
T2 = 378 K
When the pressure increases to 2.35 atm, the temperature will increase to 378 K
D. Sometimes it is necessary to put forth new theories to explain experimental results,
Explanation:
Creativity is important to science because sometimes, it is necessary to put forth new theories to explain experimental results.
Theories are explanation of scientific observations.
- Most scientists are critical and creative thinkers.
- They must be able to come up with a wide range of possible explanation to explain their findings.
- The explanations must be scientific in nature and not fall out of the basic tenets of this way of thinking.
- Therefore, scientists draw from their wealth of deductive reasoning to give explanations into an observed phenomenon.
learn more:
Purpose of conducting experiments brainly.com/question/5096428
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Hi!
The correct options would be:
1. Cathode - <em>reduction</em>
The cathode is the negatively charged electrode, and so has an excess of electrons. Cations (positively charged ions) are attracted to the cathode, and gain electrons to acquire a neutral charge. The process in which a gain of electron occurs is called reduction.
2. Anode - <em>oxidation</em>
The opposite occurs at the anode which is positively charged and attracts negatively charged ions, anions. These anions lose their electrons at the anode to acquire a neutral charge, and the process involving loss of electrons is known as oxidation.
3. Salt Bridge - <em>ion transport </em>
Salt bridge is a physical connection between the the anodic and cathodic half cells in an electrochemical cell and is a pathway that facilitates the flow of ions back and forth these half cells. Salt bridge is involved in maintaining a neutral condition in the electrochemical cells, and its absence would result in the accumulation of positive charge in the anodic cell, and negative charge in the cathodic cell.
4. Wire - <em>electron transport </em>
Wires have a universal role of being a pathway for the transport of electrons in circuit. This role is also the same in the wires involved in an electrochemical cells where they are used to transport electrons from the anodic half cell, and this electron transport results in the generation of electricity in the internal circuit of the electrochemical cell.
Hope this helps!
