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Nookie1986 [14]
3 years ago
15

can you predict the properties of a compound by knowing the properties of the elements that make up the compound?

Biology
1 answer:
MakcuM [25]3 years ago
3 0
No, you cannot determine the properties of a chemical compound by solely knowing the properties of the elements that make up the compound, because in a chemical compound, the properties are completely different and or independent of the chemical and or physical properties of the individual elements used to make up the compound.
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What is temperature control
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During a growth spurt, which is (are) likely to grow first?
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The answer are the hands and feet.  It is the continuously changes of the characteristics of the body, most noticeable in height and weight.  The ages 13-15 and 17-18 the two major brain growth spurts occur. In times of growth spurts the changes is visible during the first year of puberty.

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3 years ago
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5 0
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)]

                            = -787 KJ/mol-[ -149.2 KJ/mol-967.28 KJ/mol]

                           = -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>

3 0
3 years ago
The anterior pituitary receives hypothalamic input through the portal blood supply. what is the advantage of this type of anatom
kotegsom [21]

The advantage of this type of anatomical relationship is that this enables the pituitary to receive signals before sending hormones to the rest of the body through the blood.

The anterior pituitary, a significant component of the endocrine system, is the glandular anterior lobe that, along with the posterior lobe (also known as the posterior pituitary or neurohypophysis), constitutes the pituitary gland (hypophysis).

Stress, growth, reproduction, and lactation are just a few of the physiological activities that the anterior pituitary controls.

Blood tests that assess hormone levels are frequently used to determine if the anterior pituitary and the organs it controls are functioning properly.

The hypothalamus-hypophyseal portal veins deliver hypothalamic releasing and inhibitory hormones directly to the anterior pituitary gland.

Certain hormones from the hypothalamus bind to receptors on particular anterior pituitary cells, controlling how much of the hormone they generate is released.

Learn more about pituitary gland here brainly.com/question/1372599

#SPJ4

4 0
1 year ago
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