<span>Water is vital to the existence of plant life. Not only do plants use it to keep their cells from drying out, but they need water to move nutrients and raw materials throughout their systems to areas where photosynthesis and seed production take place. When water stress occurs, whether caused by drought or root impairment, many invisible processes are affected.</span>
Innovated Understanding Curious Logical
The characteristics of the α and β particles allow to find the design of an experiment to measure the ²³⁴Th particles is:
-
On a screen, measure the emission as a function of distance and when the value reaches a constant, there is the beta particle emission from ²³⁴Th.
- The neutrons cannot be detected in this experiment because they have no electrical charge.
In Rutherford's experiment, the positive particles directed to the gold film were measured on a phosphorescent screen that with each arriving particle a luminous point is seen.
The particles in this experiment are α particles that have two positive charge and two no charged is a helium nucleus.
The test that can be carried out is to place a small ours of Thorium in front of a phosphorescent screen and see if it has flashes, with the amount of them we can determine the amount of particle emitted per unit of time.
Thorium has several isotopes, with different rates and types of emission:
- ²³²Th emits α particles, it is the most abundant 99.9%
- ²³⁴Th emits β particles, exists in small traces.
In this case they indicate that the material used is ²³⁴Th, which emits β particles that are electrons, the detection of these particles is more difficult since it has one negative charge, it has much lower mass, but they can travel further than the particles α, therefore, for what type of isotope we have, we can start measuring at a small distance and increase the distance until the reading is constant. At this point all the particles that arrive are β, which correspond to ²³⁴Th.
Neutron detection is much more difficult since these particles have no charge and therefore do not interact with electrons and no flashing on the screen is varied.
In conclusion with the characteristics of the α and β particles we can find the design of an experiment to measure the ²³⁴Th particles is:
-
On a screen, measure the emission as a function of distance and when the value reaches a constant, there is the β particle emission from ²³⁴Th.
- The neutrons cannot be detected in this experiment because they have no electrical charge.
Learn more about radioactive emission here: brainly.com/question/15176980
The percentages of KBr and KI in the sample by mass is 80.68 and 19.32 % respectively.
<h3>What is Molar Mass ?</h3>
Molar mass is defined as the mass contained in 1 mole of sample.
It is given that
the sample has a total mass of 5.76 g contains KBr and KI
and contains 1.79 gm of K is present
what is the percentage of KBr and KI in the sample
Molecular weight of K = 39
Molecular weight of Br = 79.9
Molecular weight of I = 126.9
In KBr the mass percentage of K is 39/(39+79.9) = 32.89%
In KI the mass percentage of K is 39/(39+126.9) = 23.5%
Let the mass of KBr present in the sample is x
K will be 0.3289 x
and let the mass of KI present be y
K will be 0.235y
x +y =5.76
0.3289x+0.235y = 1.79
0.0939y = 0.1045
y = 1.1125 gm
x = 5.76-1.1125
x = 4.6475 gm
% of KBr = (4.6475/5.76 )*100 = 80.68 %
% of KI = (1.1125/5.76) *100 = 19.32%
To know more about Molar Mass
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