Which is a sustainable practice? wind farms clear cutting flood irrigation overfishing
Solution 1
Solution 2
Answer:
wind farms
Explanation:
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the correct answer is B) C2H4O2
I'm Pretty Sure the answer is C2O2H. If these are the answer choices.
BBÂ Â Bb
bb   bB
I hope this is what you're talking about. My bad if I get this totally wrong.
I hope you won't be solid on this answer, But I researched it with my colleagues, and we all agreed it's the amount of atoms in the compound. (I hope this was you question.)
Balanced nuclear reaction equation for the beta minus decay of iodine-131 is .
What is nuclear reaction?
Nuclear reaction is a reaction which changes the identity of an atomic nuclei, when high energetic particles is bombarded on that.
Beta minus decay is one of the example of nuclear reaction, and in this reaction a neutron decays into an electron which is also known as beta particle having no mass in it. And at the same time gamma rays also. In the question, it is given that iodine-131 shows beta minus decay, where the superscript of xenon is 131 and subscript of electron is -1. i.e.
We have to balance the above equation and for that sum of the superscripts and subscripts is always equal on both left and right sides.
Calculation for superscripts:
131 = 131 + y
y = 0.
Calculation for subscripts:
53 = x - 1
x = 53 + 1 = 54
Hence, balanced nuclear equation can be written as .
To learn more about nuclear reactions, visit below link:
131Â Â Â Â Â Â Â Â Â Â Â 131Â Â Â Â Â Â Â Â Â Â Â 0
     I   →        Xe  +    e
 53            54          - 1
Explanation:
1) β decay is the radiactive process in which an element (Iodine - 131) in this case undergoes a desintegration by emitting beta radiation.
2) Beta radiation are electrons.
3) The electron has a negative charge 1-, and no mass (almost not mass), so it is represented with a left supersript 0 (does not change the mass number) and a left underscript 1- (the atomic number increases in 1).
4)Â Then when iodine-131 emits a beta particle (electron) its mass number does not change, but the atomic number is increased from 53 to 54, becoming the isotope xenon - 131.
That is what the superscript to the left of Xe shows (131), while the subscript shows 54.
The subscript of electron is - 1.
So the balance is:
Iodine             Xenon          electron
 131      =         131      +      0
  53    =           54      -        1
I hope that this helps you. :)
Flame test is used to identify  metallic ions present in a sample. Each metallic ion exerts different colors to the flame. Calcium ions imparts intense red color to the flame. Hence, further  confirmation tests are to be done for calcium ions.
What is flame test?
Flame test is a preliminary test used to identify the presence of cations in the sample by colors exerted to the flame. Metallic ions such as sodium, potassium, lithium, magnesium etc.
Electrons are excited to higher energy levels by absorbing  energy and then returns to the ground level by emitting in a wavelength of complementary color. That's why see a color in the flame.
Flame test is conducted by making a paste of the sample with HCl and  a glass rod dipped in this paste is shown to the flame. Calcium ions shows' brick red flame.
To confirm the presence of calcium,  to one portion  of the sample solution, oxalic acid is added, if calcium is present a white precipitate of calcium oxalate will be formed.
To learn more about flame test, refer the link below:
#SPJ2
Noel Armstrong weighed almost 360 pounds on Earth but when he landed on the Moon, he weighed 60 pounds. This is because the gravity on the Moon is lesser than the gravity on the Earth.Â
Hope this helps.Â