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2 years ago

Identify the tectonic plate boundaries.

Chemistry

2 answers:

PolarNik [594]2 years ago

7 0

Answer:

From the top,

(1) Convergent plate boundary- Here, the two plates moves towards each other, thereby results in the subduction of denser plate under the less denser one. This type of plate boundaries are marked by a deep sea trench and generates deep focus earthquakes. For example, The San Andes mountain formed due to the subduction of Pacific plate under the South American plate.

(2) Transform plate boundary- Here, the two plates slide past one another, and conservation of plates takes place as it does not create or destroy the crust. it generates shallow focus earthquakes and are very destructive. For example, the San Andreas fault formed due to the transform boundary between the Pacific plate and North American plate.

(3) Divergent plate boundary- here, the two plates moves in the opposite direction, thereby resulting in the formation of a mid oceanic ridge. It also produces deep focus earthquakes. For example, the Mid Atlantic ridge formed due to the divergent motion of the Atlantic ocean.

Mashutka [201]2 years ago

3 0

Answer:

1: convergent boundary

2: transform boundary

3: divergent boundary

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Given the following at 25C calculate delta Hf for HCN (g) at 25C. 2NH3 (g) +3O2 (g) + 2CH4 (g) ---> 2HCN (g) + 6H2O (g) delta

AysviL [449]

<u>Answer:</u> The $\Delta H_f$ for HCN (g) in the reaction is 135.1 kJ/mol.

<u>Explanation:</u>

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. The equation used to calculate enthalpy change is of a reaction is:

$\Delta H_{rxn}=\sum [n\times \Delta H_f(product)]-\sum [n\times \Delta H_f(reactant)]$

For the given chemical reaction:

$2NH_3(g)+3O_2(g)+2CH_4(g)\rightarrow 2HCN(g)+6H_2O(g)$

The equation for the enthalpy change of the above reaction is:

$\Delta H_{rxn}=[(2\times \Delta H_f_{(HCN)})+(6\times \Delta H_f_{(H_2O)})]-[(2\times \Delta H_f_{(NH_3)})+(3\times \Delta H_f_{(O_2)})+(2\times \Delta H_f_{(CH_4)})]$

We are given:

$\Delta H_f_{(H_2O)}=-241.8kJ/mol\\\Delta H_f_{(NH_3)}=-80.3kJ/mol\\\Delta H_f_{(CH_4)}=-74.6kJ/mol\\\Delta H_f_{(O_2)}=0kJ/mol\\\Delta H_{rxn}=-870.8kJ$

Putting values in above equation, we get:

$-870.8=[(2\times \Delta H_f_{(HCN)})+(6\times (-241.8))]-[(2\times (-80.3))+(3\times (0))+(2\times (-74.6))]\\\\\Delta H_f_{(HCN)}=135.1kJ$

Hence, the $\Delta H_f$ for HCN (g) in the reaction is 135.1 kJ/mol.

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3 years ago

Which power source uses the earth’s internal heat?

Nataly_w [17]

Answer:

Its geothermal energy.

Explanation:

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3 years ago

Physical science!!! please help

IgorLugansk [536]

Answer:

The correct answer is : No, because there are 4 hydrogen atoms on the reactants side and 2 on the products side.

Explanation:

$NH_4NO_3\rightarrow N_2O+H_2O$

The given reaction equation is not balanced because:

Number of hydrogen atoms on both sides are not equal that is 4 on reactants side and 2 on products side.
Number of oxygen atoms on both sides are not equal that is 3 on reactants side and 2 on products side.

In a balanced chemical equation number of atoms of each elements are equal on both sides.

So, the balanced chemical equation will be:

$NH_4NO_3\rightarrow N_2O+2H_2O$

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DedPeter [7]

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Explanation:

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Substance X and Y, belong to the states of matter.

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2 years ago

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lozanna [386]

Answer:

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Explanation:

P1V1T2=V2P2T1

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Fill in with given values then solve

We can check this by knowing that V and T at constant P have a proportional relationship. Hence, this is correct.

- Hope that helped! Please let me know if you need further explanation.

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