Answer:
C.) Alien thickness is mainly affected by temperature. The greater thickness at lower temperatures may be used as a way to stay warmer in colder weather.
Explanation:
Environmental systems.
(2) 137Cs (4) 220Fr
Answer: The correct option is 4.
Explanation: All the options will undergo some type of radioactive decay processes. There are 3 decay processes:
1) Alpha decay: It is a decay process in which alpha particle is released which has has a mass number of 4 and a charge of +2.
2) Beta-minus decay: It is a decay in which a beta particle is released. The beta particle released has a mass number of 0 and a charge of (-1).
3) Beta-plus decay: It is a decay process in which a positron is released. The positron released has a mass number of 0 and has a charge of +1.
For the given options:
Option 1: This nuclei will undergo beta-plus decay process to form
Option 2: This nuclei will undergo beta-minus decay process to form
Option 3: This nuclei will undergo a beta minus decay process to form
Option 4: This nuclei will undergo an alpha decay process to form
Hence, the correct option is 4.
Answer: ima gemini :3
Explanation:
Answer:
OMG same im Dec 18
Explanation:
Answer:
This reaction is completed by a double displacement
A double displacement occurs when two different salts are mixed in an aqueous state, since when they dissolve a salt their ions are dissociated and when mixed with another salt in an aqueous state they combine and form two new compounds
Double displacement reactions
Are the products or reactants favored?
The equilibrium system N2O4(g) 2NO2(g) was established in a 1.00-liter vessel. Upon analysis, the following information was found: [NO2] = 0.500 M; [N2O4] = 0.0250 M. What is the value of Keq?
3.Which is the correct expression for Keq when the chemical reaction is as follows:
N2 + 3H2 2NH3.
4.Reactions which do not continue to completion are called ______reactions.
Answer: 1)
Equilibrium constant is defined as the ratio of the product of concentration of products to the product of concentration of reactants each term raised to their stochiometric coefficients.
where [] = concentration in Molarity=
Thus
As the value of K is greater than 1, the reaction is product favored.
2)
3)
4) Reactions which do not continue to completion are called equilibrium reactions as the rate of forward reaction is equal to the rate of backward direction.
3 billion
4 ½ billion
6 ½ billion
Answer is 4 ½ billion.
Scientists think the earth's age is 4 ½ billion. This calculation is based on the radioactive dating. Since the formation of the earth, the time period has been divided into 3 major geological time periods as eon. They are phanerozoic, proterozoic and archean.
Scientists estimate that the Earth is approximately 4.5 billion years old based on radiometric dating and other lines of evidence.
The correct answer is 4 ½ billion years. Scientists believe that the Earth is approximately 4.5 billion years old based on evidence from radiometric dating of rocks on Earth and meteorites. Radioactive elements such as uranium and potassium decay into stable isotopes over time, and by measuring the ratio of parent isotopes to daughter isotopes in rocks, scientists can estimate the age of the Earth.
This estimation is supported by other lines of evidence, such as the age of the oldest rocks on Earth and the Moon, and the ages of meteorites. These findings suggest that the Earth formed shortly after the formation of the Solar System, which is estimated to be about 4.6 billion years old.
Therefore, the most accurate estimation is that the Earth is approximately 4.5 billion years old.
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