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Delvig [45]
3 years ago
15

What are two elements that produce background radiation on earth and what do their decay equations look like?

Chemistry
2 answers:
AlekseyPX3 years ago
8 0
The two elements that produce background radiation on earth are Radon and Uranium. Airborne radon can decay on its own. Radon undergoes alpha decay to produce Polonium. Uranium naturally undergoes alpha decay to produce Thorium.
Tju [1.3M]3 years ago
3 0

Answer:

Radon and Uranium            

Explanation:

Two elements that produce background radiation are: Radon and Uranium. These elements are present in soil or air and naturally decay to form the elements as shown below:

Decay equation of Radon:

^{222} _{86}Rn \rightarrow ^{218} _{84}Po + ^4 _2 He

Decay Equation of Uranium:

^{234} _{92}U  \rightarrow ^{230} _{90}Th + ^4 _2 He

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Which of the following provides the best description of the function of genes?
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Answer:

D. Controlling the production of specific proteins.

Explanation:

Genetic material is the main thing that inherited from parents to their offsprings. Gene encodes proteins that will be expressed(produced) when it needed. The protein can be used to build the cell organ, enzyme enzyme that digest food, hormones, and many other things. By inheriting the gene, the offspring will have a similar traits to the parent. The trait can differ a lot for sexual reproduction since only half of each parent gene inherited to the offspring.

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4 years ago
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Ksju [112]

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3 years ago
How do humans contribute to these excessive levels of phosphorus
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5 0
3 years ago
Which of the following statements is false? a. Temperatures of a few nanokelvins can be achieved in a Bose-Einstein condensate.
Veronika [31]

Answer:

Option D

A reversible process is one in which a large change in conditions can reverse its direction.

Explanation:

A. Temperatures of a few nanokelvins can be achieved in a Bose-Einstein condensate. TRUE

b. A perfect crystal of any substance at 0 K has minimum entropy. is TRUE

c. The standard molar entropy of a substance at temperature T is a measure of the quantity of energy that must be dispersed in that substance for it to exist at T. is TRUE

d. A reversible process is one in which a large change in conditions can reverse its direction. is FALSE

e. Entropy is a measurement of the nanoscale dispersal of energy in a sample of matter. is TRUE

A reversible reaction is one that can return to it's normal direct even if an infinitesimal change is applied to some of it's conditions.

7 0
3 years ago
The enthalpy of formation of CO2 at 25oC is -393.51 kJ/mol. What is the enthalpy of formation at 500 oC?
Kisachek [45]

Answer:

-375.9_KJ/(mol)

Explanation:

H(T2 ) ≈ H(T1)+CPΔT

Specific heat of Carbon is 0.71 J/g K.

At 283.15 the heat capacity is 37.12 J/(mol*K)

Kirchhoff's law

H(T2 ) ≈ H(T1)+CPΔT

Where

H(T1) and H(T2 ) are the heat of formation of CO2 at temperatures T1 and T2

CP is the heat capacity

Thus we have and ΔT is the temperature change

H(T2 ) ≈ -393.51×10^3+CP×(500-25)

= -393.51×10^3+37.12×(500-25)

= -375878 J/(mol)

= -375.9KJ/(mol)

6 0
3 years ago
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