The type of decay that Am-241 undergoes to become Np-237 is alpha decay. The correct option is a.
What is alpha decay?Alpha decay is a type of decay or transformation in which a nucleus emits an alpha particle and change into different atomic nuclei. The atomic number reduces by 2 and the mass is reduced by 4.
Am-241 is an isotope of the chemical element americium. It is a radioactive element and its radioactive decay period is 432.2 years. It is used in the testing of machinery.
When the nucleus of Am changes or emits a radioactive particle. It converts into Np-237. The process is called alpha decay. The atomic mass is reduced by four, and the 241 converts into 237, which become neptunium.
Thus, the correct option is a. Alpha decay.
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Which of the following is not an example for electroplating? A Tin cans for storing food
B Chromium used on bath taps to get shiny appearance
C Copper used for making electrical wires
D To protect iron objects used in machineries, from corrosion
If you answer you will get brainiest
Please answer and thank
Answer:
C. Copper used for making electrical wires
Explanation:
When a coating of a particular metal is applied on another metal, the process is termed as electroplating. The process is carried by the process of electro-deposition. This process is carried on in order to enhance the quality of the objects manufactured. The coating helps in resistance and provides an attractive appearance to the object.
Option C. is not an example of electrocoating because on the copper wires no other metal coating is done. In all the other three options, coating has been done on the object.
Which is an energy source for a coyote?
Answer:
The coyotes are both a plant and meat eaters whose common food is 90% of their diet, is small animals. Rabbits, hares, birds, snakes, fish, crustaceans, and insects are all on the menu.
hopefully this is right :))
Answer:
sun
Explanation:
questions.
1) The degree of polarity of a bond is indicated by
A. Ionization energy difference
B. The shape of the molecule
C. Electronegativity difference
D. The partial charges of the molecule
2) When electrons are shared unequally, chemists characterize
Answer:
d
Explanation:
the partial charges of the molecule
Describe how greater distance affects the appearance of an object’s size and brightness
Answer:
Distance also affects the apparent brightness of an object. A distant, but very energetic star can appear dimmer to us than a lower-energy, but closer one. ... Each of their effective temperatures results in a different brightness for the object. The quasar, however, is very far away, and so appears dim.
Explanation:
Kevin is working on a model that shows the positions of Earth, the Moon, and the Sun during the phases of the Moon. How should he position them to show a New Moon?
What is the most likely oxidation state of nitrogen?
O A. -2
OB. +3
O C. +4
O D.-3
D is the answer -3 m
What do acids do in solution?
describe un modelo matemático para representar lo que sucede en cada una de las reacciones químicas (incluye toda la simbología que puedas) y clasifícalas según consideres de acuerdo con lo abordado en el tema.
1. El hidrógeno molecular reacciona con el oxígeno molecular y produce agua
2. El Óxido de calcio reacciona con el agua y produce hidróxido de calcio
3. El sulfuro de hierro (II) se produce cuando reacciona el azufre y el hierro en su forma atómica
4. El ácido sulfuroso se descompone por la acción de calor en dióxido de azufre gaseoso y agua
5. El carbonato de calcio se descompone por la acción de calor en oxido de calcio y dióxido de carbono gaseoso.
6. El magnesio reacciona con el ácido clorhídrico y produce dióxido de magnesio e hidrógeno gaseoso.
AYUDAAAAA
Responder:
2H2 + O2 → 2H2O
CaO + H2O → Ca (OH) 2
Fe + S → FeS
H2SO3 → SO2 + H2O
CaCO3 → CaO + CO2
Explicación:
2H2 + O2 → 2H2O
2 moléculas de hidrógeno gaseoso reaccionan con oxigente para producir 2 moléculas de agua
CaO + H2O → Ca (OH) 2
El óxido de calcio reacciona con el agua para producir hidróxido de calcio.
Fe + S → FeS
El hierro reacciona con el azufre para producir sulfuro de hierro.
H2SO3 → SO2 + H2O
Por descomposición, el ácido sulfuroso se descompone para producir dióxido de azufre y agua.
CaCO3 → CaO + CO2
El carbonato de calcio se descompone para producir óxido de calcio y dióxido de carbono.
what is the difference b/w combustion and synthesis reaction ?explain with example
Answer:
A synthesis reaction occurs when two or more reactants combine to form a single product in a double replacement reaction two compounds exchange elements. Combustion reaction occurs when a substance reacts quickly with oxygen combustion is commonly called burning. Example'- for synthesis reaction is iron+ oxygen —≥ water . Example:- for combustion reaction is often gaseous products.
may be this was ur answer I hope it might help u
I could swear all of these are nobles gases but here’s the question.
Which one of these is NOT a Noble Gas
A) Argon
B) Helium
C) Xenon
D) Neon
Typically, your percent yield is ______ than 100% because ___________________________.
Reasons why percent yield is more than 100
Typically, percent yields are understandably less than 100% because of the reasons indicated earlier. However, percent yields greater than 100% are possible if the measured product of the reaction contains impurities that cause its mass to be greater than it actually would be if the product was pure.
figure it out
Answer:
Explanation:
A
Identify any incorrect formulas. Explain your answer.
a. Mg2(SO4)3
b. Rb3As
c. BeCl3
d. NaF
Wish I could award more points but I'm running low.
The formula of a compound is written based on the valency of each bonded atoms. The formulas Mg₂(SO₄)₃, Rb₃As are incorrect. Such compounds does not exist.
What is chemical formula?The formula of a chemical compound is written based on the number of atoms participated in bonding. Magnesium is second group element having two valence electrons.
Magnesium thus donates its two electrons into the bonding atom or group. The sulphate group SO₄ have a valency of 2 it gains two electrons from Mg when bonded.
Thus the formula of magnesium sulphate being MgSO₄ and not Mg₂(SO₄)₃. Similarly Rb is a second group metal having two valence electrons. Its valency being two. As is a halogen with valency one. Thus they cannot form a compound like Rb₃As.
Hence, option a and b are incorrect formulas.
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Sound Wave, Ripple in water, Guitar String, TV Signal, Which one does not belong? Why?
Answer:
The TV signal.
Explanation: Hope this is right! :)
What group on the periodic table has the fewest valance electrons
Answer:
Alkali metals
Explanation:
The lowest number of valence electrons is found in the alkali metals (group 1), which have only one valence electron per atom.
Answer:
Alkali metals:) im 100% sure because i just got done learning everything in the periodic table:)
Explanation:
HELLP PLEASE
_ Na+Cl 2 -> _NaCl
reactant side number of atoms?
Na = ?
Cl = ?
Product side number of atoms?
Na = ?
Cl = ?
what is the final equation?
_ Na+Cl 2 -> _NaCl
Answer:
2Na+Cl2 -> 2NaCl
Explanation:
1Na+1Cl 2 -> 1NaCl (i'm assuming they want you to balance it so ill start with 1)
Na = 1
Cl = 2 (it is 2 because it is Cl2, meaning that there are 2; but remember that you cannot change this number only coefficients)
Na = 1
Cl = 1
We need to have 2 Cl on the product side
1Na+1Cl 2 -> 2NaCl
Now we need 2 Na on the reactants side
The final equation is
2Na+Cl2 -> 2NaCl
Now it is balanced
Na = 2
Cl = 2
--
Na = 2
Cl = 2
How many atoms can be found in 6.7 moles of Bromine (Br)
Question 7 options:
4.03 x 10^24
9.13 x 10^-24
8.99 x 10^22
3.31 x 10^24
Answer:
The first one is correct, 4.03 x 10^24.
Determine the number of molecules present in 1.53 mol of carbon monoxide
Answer:
hi
Explanation:
this is my first time on this app so what do i do
How many moles of NaCl can be made from 16 moles of Na?
Which rate law is consistent with the mechanism?
If the moon is full on January 16, on approximately what date will it be full in February?
A. February 10
B. February 22
C. February 1
D. February 12
Answer:
February 12th.
Explanation:
Trust me.
Buoyancy, density, ductility and solubility describe the ________ of matter
Answer:
the answer is physical properties
How many grams of molecular chlorine will be required to completely react with 0.0223 moles of sodium iodide according to the following reaction?
2Nal + Cl2 ---> 2NaCl + I2
A. 1.57 104 grams
B. 3.16 grams
C. 0.0112 grams
D. 0.791 grams
The amount of chlorine will be 0.791 gram required to completely react with 0.0223 moles of sodium iodide .
The given chemical reaction is :
2Nal + [tex]Cl_{2}[/tex] → 2NaCl + [tex]I_{2}[/tex]
It is given that:
Amount of sodium iodide = 0.0223 mol.
Atomic mass of chlorine = 35.45 g.
The amount of chlorine can be calculated as:
0.0223mol. NaI × (1mol. Cl₂/2mol. NaI) × (35.45g/1mol. Cl2)
=0.791 grams
Therefore, the correct answer will be option (D).
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hi help plz .........
Answer:The answer is C) The total mass of C and D only.
In an ecosystem, which of the fcHlowing is NOT a trait of living organisms?
Contains DNA
Can reproduce
Made of cells with membrane
Responds to stimuli
Answer:
responds to a stimuli or made of cells with membrane
Explanation
Equilibrium constant Kp for the reaction P4(s) + 6Cl2(g) 4PCl3(l) Kp = 1/ P6Cl2 Kp = P4Cl3/ P6P4 Kp = P4Cl3/ (P6P4) (P6Cl2) Kp = 1/ (P6P4) (P6Cl2)
Answer: [tex]K_p=\frac{1}{[p_{Cl_2}]^6}[/tex]
Explanation:
Equilibrium constant is defined as the ratio of pressure of products to the pressuure of reactants each raised to the power their stoichiometric ratios. It is expressed as [tex]K_p[/tex]
For the given chemical reaction:
[tex]P_4(s)+6Cl_2(g)\rightarrow 4PCl_3(l)[/tex]
The expression for [tex]K_p[/tex] in terms of gaseous is written as:
[tex]K_p=\frac{1}{[p_{Cl_2}]^6}[/tex]
a car motor running as a car travels down the road.
Kinetic Energy
Potential Energy
Answer:
kinetic energy
Explanation:
force is used
What is the name of this nuclear process ?
Answer:
Fission
Explanation:
1.
a) If 1.08 g of sodium sulfate reacts with an excess of phosphoric acid, how much sulfuric acid is produced? (0.74577)
b) If 0.726 g of sulfuric acid is produced in the laboratory experiment, what is the percent yield of sulfuric acid? (97.3190)
2.
If 3.2 moles of sodium sulfate is used in the reaction, how many formula units of phosphoric acid is needed to completely react?
(1.28427×1024
Answer:
1. a) 0.745 g of H₂SO₄
b) 97.4%
2. 1.28×10²⁴ formula units
Explanation:
First of all, we determine the equations:
3Na₂SO₄ + 2H₃PO₄ → 3H₂SO₄ + 2Na₃PO₄
We determine, the moles of sodium sulfate. (As the acid is in excess, we work with the salt)
1.08 g . 1mol/ 142.04g = 0.00760 moles.
Ratio is 3:3. So 3 moles of salt can produce 3 moles of sulfuric acid,
Then, 0.00760 moles will produce the same amount of acid.
We convert the moles to mass → 0.00760 mol . 98 g/mol = 0.745 g
Percent yield = (Produced yield /Theoretical yield) . 100
(0.726 g / 0.745 g) . 100 = 97.4 %
2. 3 moles of sodium sulfate need 3 moles of phosphoric acid to react
Then, 3.2 moles of salt will react to (3.2 . 2)/3 = 2.13 moles
Let's count the formula units:
2.13 mol . 6.02×10²³ formula units /mol = 1.28×10²⁴ formula units.
menciona tres ejemplos en los que un cálculo incorrecto en los en ingredientes indispensables para la elaboración de un producto traería consecuencias graves químicamente hablando
Explanation:
Cada producto o servicio, independientemente de su propósito, debe ser seguro de usar y desarrollado de acuerdo con los más altos estándares de calidad y seguridad.
Algunos ejemplos de cálculo incorrecto de ingredientes que tendrían graves consecuencias químicas podrían ser:
Medicamentos y vacunas: Este es quizás uno de los ejemplos que tendría las consecuencias más graves para las personas si hubiera un cálculo incorrecto de ingredientes, ya que la producción de medicamentos y vacunas es una industria que requiere la máxima calidad agregada debido a que se ocupa directamente de la salud y los errores de formulación pueden agravar la enfermedad y causar la muerte. Actualmente tenemos el ejemplo de la vacuna para el control de la pandemia, que antes de ser aprobada tuvo que someterse a una serie de investigaciones, pruebas en humanos y diferentes fases para demostrar su efectividad y no causar daño al organismo humano.
Cosméticos: Existen cosméticos de la industria de la belleza que tienen la función de prevenir el envejecimiento cutáneo, alisar el cabello, etc. Por tanto, un cálculo incorrecto de los ingredientes químicos también podría provocar daños irreversibles a la salud, como quemaduras en la piel, caída del cabello, alergias, cáncer, etc.
Alimentos: La industria alimentaria utiliza componentes químicos con el fin de conservar los productos y aumentar la vida útil, por lo que si se usan en cantidades mayores de las necesarias, dichos compuestos pueden causar enfermedades en las personas como intoxicación alimentaria, cáncer, gastritis, etc.
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Answer:
finally found
31th July 2000