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2 years ago

Order frome largest to smallest Allele,Chromosome,DNA, nucleus of a cell

Chemistry

1 answer:

svetlana [45]2 years ago

5 0

Allele, dna, chromosome, nucleus of a cell

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How are the inner core and outer core diffrent?How are they similar

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They are totally different the Inner core is solid and hotter is made of iron, the outer core is liquid the and is made of iron and nickel

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2 years ago

Aluminum chloride can be formed from its elements:

saul85 [17]

Answer: The $\Deltas H^o_{formation}$ for the reaction is -1406.8 kJ.

Explanation:

Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.

According to this law, the chemical equation is treated as ordinary algebraic expressions and can be added or subtracted to yield the required equation. This means that the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes of the intermediate reactions.

The chemical reaction for the formation reaction of $AlCl_3$ is:

$2Al(s)+3Cl_2(g)\rightarrow 2AlCl_3 (s)$ $\Delta H^o_{formation}=?$

The intermediate balanced chemical reaction are:

(1) $HCl(g)\rightarrow HCl(aq.)$ $\Delta H_1=-74.8kJ$ ( × 6)

(2) $H_2(g)+Cl_2(g)\rightarrow 2HCl(g)$ $\Delta H_2=-185kJ$ ( × 3)

(3) $AlCl_3(aq.)\rightarrow AlCl_3(s)$ $\Delta H_3=+323kJ$ ( × 2)

(4) $2Al(s)+6HCl(aq.)\rightarrow 2AlCl_3(aq.)+3H_2(g)$ $\Delta H_4=-1049kJ$

The expression for enthalpy of formation of $AlCl_3$ is,

$\Delta H^o_{formation}=[6\times \Delta H_1]+[3\times \Delta H_2]+[2\times \Delta H_3]+[1\times \Delta H_4]$

Putting values in above equation, we get:

$\Delta H^o_{formation}=[(-74.8\times 6)+(-185\times 3)+(323\times 2)+(-1049\times 1)]=-1406.8kJ$

Hence, the $\Deltas H^o_{formation}$ for the reaction is -1406.8 kJ.

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2 years ago

Which of the following are drugs that are important sources of toxicity because of their wide availability, otc status, and unin

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The correct answer is A. Analgesic are used to treat all forms of pain and because of their wide availability people buy them without proscription. This leads to a lot of undesirable side effects.

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2 years ago

What is the energy of a photon of green light with a frequency of 5.80 x 10^14/s

dedylja [7]

I'm not understanding that much. but if i'm right the answer is 3.84 x 10^-19 J

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3 years ago

Please help me I don’t know this

Zina [86]

Answer:

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1 year ago

Order frome largest to smallest Allele,Chromosome,DNA, nucleus of a cell​

Order frome largest to smallest Allele,Chromosome,DNA, nucleus of a cell