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3 years ago

what are 2 differences between the atomic theory described by Thompson and that described by Rutherford ?

Chemistry

1 answer:

Alchen [17]3 years ago

6 0

Explanation:

1)Thomson model, electrons are embedded in positive charged solid material(nucleus)

Rutherford model, electrons surround the positive charged nucleus

2)Thomson, does not explain about atomic nucleus

Rutherford, explains in detail about nucleus

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How are elements in the same group in the periodic table alike

kolbaska11 [484]

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3 years ago

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Its chemistry: isotopes, elements, due Wednesday thanks

bulgar [2K]

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3 years ago

Gold forms a substitutional solid solution with silver. Compute the number of gold atoms per cubic centimeter for a silver-gold

Mama L [17]

<u>Answer:</u> The number of gold atoms per cubic centimeters in the given alloy is $1.83\times 10^{22}$

<u>Explanation:</u>

To calculate the number of gold atoms per cubic centimeters for te given silver-gold alloy, we use the equation:

$N_{Au}=\frac{N_AC_{Au}}{(\frac{C_{Au}M_{Au}}{\rho_{Au}})+(\frac{M_{Au}(100-C_{Au})}{\rho_{Ag}})}$

where,

$N_{Au}$ = number of gold atoms per cubic centimeters

$N_A$ = Avogadro's number = $6.022\times 10^{23}atoms/mol$

$C_{Au}$ = Mass percent of gold in the alloy = 42 %

$\rho_{Au}$ = Density of pure gold = $19.32g/cm^3$

$\rho_{Ag}$ = Density of pure silver = $10.49g/cm^3$

$M_{Au$ = molar mass of gold = 196.97 g/mol

Putting values in above equation, we get:

$N_{Au}=\frac{(6.022\times 10^{23}atoms/mol)\times 48\%}{(\frac{48\%\times 196.97g/mol}{19.32g/cm^3})+(\frac{196.97g/mol\times 58\%}{10.49g/cm^3})}\\\\N_{Au}=1.83\times 10^{22}atoms/cm^3$

Hence, the number of gold atoms per cubic centimeters in the given alloy is $1.83\times 10^{22}$

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3 years ago

0.20 L of HNO3 is titrated to equivalence using 0.12 L of 0.2 M NaOH. What is the concentration of the HNO3?

AleksandrR [38]

$M_{A}V_{A}=M_{B}V_{B}\\(0.20)(M_{A})=(0.12)(0.2)\\M_{A}=\frac{(0.12)(0.2)}{(0.20)}=\boxed{0.12 \text{ M}}$

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2 years ago

___traits determine how an organism acts on a regular basis

s344n2d4d5 [400]

Answer:

Acquired Trait

Explanation:

1.An acquired trait are the characteristics that are responsible for the production of the phenotypic characteristics that are the products of the environmental influences.

2.The acquired traits are not heritable traits that is they are not inherited by the parents from their offsprings.

3.The acquired traits are the traits which one attain from the environment.

4.For example, development of tanning on the skin due to excess sun exposure and color of the hair.

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3 years ago