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3 years ago

15

The first living things to live in an are are*

1 answer:

Alex17521 [72]3 years ago

8 0

Answer:

Pioneer species

Explanation:

Pioneer species are organisms that are first to colonize and area that is barren, or an area that was heavily disrupted. It could have been disrupted by natural disasters like volcano eruption or a flood. These organisms can grow on bare rock, which (with some help from wind and water) weathers the rocks and create soil. The soil formed eventually allows other forms of life, like plants to move in the area.

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Which quantity is constant when working with boyles, charles, and gay lussacs law?

oee [108]

boyles law states that the volumes of a gas will decrease as pressure increases if the temperature remains constant.

charles law states that the volume of a gas will increase as temp increases if the pressure remains constant.

gay-lussacs law states that the pressure increases as temp increases if the volume remains constant.

7 0

3 years ago

Read 2 more answers

(34.969amu)(0.7577) =<br> (36.966amu)(0.2423) =<br> +

Monica [59]

Answer:

26.4 960 for the first one

8.9569 for the second one

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3 years ago

Which is a physical characteristic of a fish?

Nitella [24]

Answer:

Gill's

Explanation:

Fish's have many characteristics that differ from humans, and one of them is the gills.

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3 years ago

The standard internal energy change for a reaction can be symbolized as Δ U ∘ rxn or Δ E ∘ rxn . For each reaction equation, cal

rosijanka [135]

Answer : The internal energy change is, -506.3 kJ/mol

Explanation :

Formula used :

$\Delta H=\Delta U+\Delta n_gRT$

or,

$\Delta U=\Delta H-\Delta n_gRT$

where,

$\Delta H$ = change in enthalpy = $-511.3kJ/mol=-511300.0J/mol$

$\Delta U$ = change in internal energy = ?

$\Delta n_g$ = change in moles

Change in moles = Number of moles of product side - Number of moles of reactant side

According to the reaction:

Change in moles = 0 - 2 = -2 mole

That means, value of $\Delta n_gRT$ = 0

R = gas constant = 8.314 J/mol.K

T = temperature = $25^oC=273+25=298K$

Now put all the given values in the above formula, we get

$\Delta U=\Delta H-\Delta n_gRT$

$\Delta U=(-511300.0J/mol)-[-2mol\times 8.314J/mol.K\times 298K$

$\Delta U=-511300.0J/mol+4955.144J/mol$

$\Delta U=-506344.856J/mol=-506.3kJ/mol$

Therefore, the internal energy change is -506.3 kJ/mol

6 0

3 years ago

4.8 tons of pig ovaries were required to extract 12.0 mg of estrogen

bearhunter [10]

Is this a question? if so please elaborate.

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2 years ago