Answer:
Explanation:
Hello,
In this case, the enthalpy of combustion is understood as the energy released when one mole of fuel, in this case octene, is burned in the presence of oxygen and is computed with the enthalpies of formation of the fuel, carbon dioxide and water as shown below (oxygen is circumvented as it is a pure element):
Thus, since we already know the enthalpy of combustion of the fuel, for carbon and water we have -393.5 and -241.8 kJ/mol respectively, thereby, the enthalpy of combustion turns out:
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Answer:
Because they are normally dissolved in water
Explanation:
The phospholipids can act as molecules that are carry inside or outside the cells, to transport it they are dissolved in another hydrophilic media, in this way the hydrophilic part can be in the outside part of the group of moleucles stick together like in cell membranes that are conformed by a double lipidic layer, in which the hydrophobic part it in the inside part. The cells normally are surrounded by different water solutions as the blood or another solutions.
Watershed
A watershed is an entire river system of an area drained by a river and its tributaries
The element that would have properties most like calcium (ca) is
Beryllium (Be)
Magnesium (Mg)
Strontium (Sr)
Barium (Ba)
This are elements in group two in the periodic table. They are also known as Alkaline earth metals. They have an oxidation state of 2+ since they have two valence electrons in their outermost energy levels.
