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Morgarella [4.7K]
2 years ago
9

Endocrine system secretes hormones that

Biology
1 answer:
solong [7]2 years ago
5 0
The answer for this will be C an integration of organ systems this is because the endocrine system also works with the nervous system and immune system etc
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3 years ago
How is enthalpy used to predict whether a reaction is endothermic or exothermic?
Radda [10]

<u>Answer:</u>

<em>329.48 KJ/mol heat is released by the combustion of 2 molof methane</em>

<u>Explanation:</u>

The value of enthalpy determines whether the reaction is exothermic or endothermic. If the enthalpy change is positive, then the reaction is endothermic (heat or energy released) and if the enthalpy change is negative then the reaction is exothermic (heat or energy absorbed).

2CH_4(g)+4O_2(g) => 2CO_2(g)+4H_2O(g)

\Delta H \ reaction=[ 2(\Delta HfCO_2)+ 4(\Delta HfH_2O)]-[2(\Delta HfCH_4)+4(\Delta HfO_2)]

                            =2 ( -(393.5 KJ)/mol)-[2( -74.6 KJ/mol)+4(-241.82 KJ/mol)]

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                           = -787 KJ/mol+1116.48 KJ/mol

                                          =329.48 KJ/mol

<em>In this question, </em><em>the enthalpy of formation</em><em> has positive value and hence the </em><em>reaction is endothermic</em><em> in which the heat is released. </em>

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3 years ago
What are genetically modified foods?
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Answer:

it means They have been tampered with by chemicals steroids its science that makes foods bigger and tastes better.

Explanation:

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Answer:

A

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Bc it is the highest point in choices

4 0
3 years ago
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