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3 years ago

14. Elizabeth is getting ready to run a marathon. She's hoping that the ATP in her body is good for

Biology

2 answers:

soldier1979 [14.2K]3 years ago

8 0

Answer:

Explanation:

drek231 [11]3 years ago

4 0

Answer:

A / D

Explanation:

It can only provide energy for brief periods of time—eight to ten seconds. The system can be accessed a number of times, but will eventually exhaust the “built-in” supply of ATP - even with the help of the Creatine Phosphate molecule. And it's energy density is incredibly low. It is a big molecule with a molecular weight of 507. yet all the usable energy is in the two terminal phosphate groups.

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Which of the following organisms is likely to be in the lowest trophic level

Zielflug [23.3K]

Answer:

plankton

Explanation:

plankton are eaten by pretty much everything as they are so small. they also get food through photosynthesis therefore they do not eat any other animals. i am pretty certain krill eat them but i dont know

7 0

2 years ago

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How is enthalpy used to predict whether a reaction is endothermic or exothermic?

Radda [10]

Answer:

$329.48 KJ/mol$ heat is released by the combustion of $2 mol$ of methane

Explanation:

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).

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

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

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

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

$= -787 KJ/mol+1116.48 KJ/mol$

$=329.48 KJ/mol$

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

3 0

3 years ago

Force in the liquid are the forces of attraction between the molecules within the liquid.

ziro4ka [17]

The surface tension of a liquid results from an imbalance of intermolecular attractive forces, the cohesive forces between molecules: A molecule in the bulk liquid experiences cohesive forces with other molecules in all directions. A molecule at the surface of a liquid experiences only net inward cohesive forces.

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2 years ago

Which technique often results in poor farmland?

VladimirAG [237]

The answer would be A, slash and burn.

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3 years ago

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____ is the thermal energy transfer that occurs from the motion of fluid in a liquid or gas.

Gnesinka [82]

Radiation is the thermal energy transfer

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3 years ago

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