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EleoNora [17]
3 years ago
7

The table below shows the time that the Moon rose and set over a few days.

Chemistry
1 answer:
Llana [10]3 years ago
4 0

Answer:

C.

rise at 6:20 a.m., set at 4:16 p.m.

Explanation:

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Answer: The enthalpy of formation of SO_3 is  -396 kJ/mol

Explanation:

Calculating the enthalpy of formation of SO_3

The chemical equation for the combustion of propane follows:

2SO_2(g)+O_2(g)\rightarrow 2SO_3(g)

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

\Delta H^o_{rxn}=[(2\times \Delta H^o_f_{(SO_3(g))})]-[(2\times \Delta H^o_f_{(SO_2(g))})+(1\times \Delta H^o_f_{(O_2(g))})]

We are given:

\Delta H^o_f_{(O_2(g))}=0kJ/mol\\\Delta H^o_f_{(SO_2(g))}=-297kJ/mol\\\Delta H^o_{rxn}=-198kJ

Putting values in above equation, we get:

-198=[(2\times \Delta H^o_f_{(SO_3(g))})]-[(2\times \Delta -297)+(1\times (0))]\\\\\Delta H^o_f_{(SO_3(g))}=-396kJ/mol

The enthalpy of formation of SO_3 is -396 kJ/mol

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Why was nutmeg also called the spice of madness
lapo4ka [179]
It was called the “spice of madness” because it had an hallucinogenic property.
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Answer:

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Explanation:

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A student does not observe a change when holding a test tube in a flame. However, a change is expected. What is the most likely
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