All categories

2 years ago

Qué es el ecosistema ?

Biology

1 answer:

Svetlanka [38]2 years ago

7 0

Answer:

Spanish - Una comunidad biológica de organismos que interactúan y su entorno físico.

English - a biological community of interacting organisms and their physical environment.

por favor, márcame más inteligente

You might be interested in

Does one smile increase or decrease the chances of another

Lerok [7]

Answer:

increase the chances of another

3 0

2 years ago

Why is still water an ideal enviroment for mold and cast fossils

elena55 [62]

Answer:

Sediment builds up over organisms.

Explanation:

3 0

2 years ago

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

2 years ago

What are the three functions of a cell membrane? I will give Brainliest to the best answer!

____ [38]

(1) they keep toxic substances out of the cell;
(2) they contain receptors and channels that allow specific molecules, such as ions, nutrients, wastes, and metabolic products, that mediate cellular and extracellular activities to pass between organelles and between the cell and the outside environment;
(3) they separate vital but incompatible metabolic processes conducted within organelles.

3 0

2 years ago

Newborn male is scheduled for a circumcision. he is sterilely prepped and draped; a penile nerve block is performed. the circumc

Lisa [10]

54150

The patience is having the circumcision preformed with a ring device (other device) guiding you in selecting code 54150. It is inappropriate to code 64450 with 54150 since penile block is included and stated in code description

7 0

2 years ago