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3 years ago

The energy organisms need to live and grow first enters the ecosystem when

Chemistry

1 answer:

notka56 [123]3 years ago

5 0

The answer is A. Energy first enters an ecosystem through light energy that is absorbed through photo-synthesizers

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Which of the following values best classifies a bond between 2 atoms as<br> being covalent?

Genrish500 [490]

Answer:

C. An electronegativity difference of less than 1.7 between the atoms

Explanation:

I have no idea but that’s correct I just answered it on apex

5 0

3 years ago

A 20 L cylinder of gas at 5.6 atm pressure at 35 degrees Celsius is heated to 95 degree Celsius and compared to 23 atm. What is

ella [17]

Answer:

5.8 L

Step-by-step explanation:

This looks like a case where we can use the <em>Combined Gas Law</em> to calculate the temperature.

p₁V₁/T₁ = p₂V₂/T₂ Multiply both sides by T₂

p₁V₁T₂/T₁ = p₂V₂ Divide each side by V₂

V₂ = V₁ × p₁/p₂ × T₂/T₁

=====

<em>Data</em>:

p₁ = 5.6 atm

V₁ = 20 L

T₁ = 35 °C = 308.15 K

p₂ = 23 atm

V₂ = ?

T₂ = 95 °C = 368.15 K

=====

<em>Calculation: </em>

V₂ = 20 × 5.6/23 × 368.15/308.15

V₂ = 20 × 0.243 × 1.19

V₂ = 5.8 L

6 0

3 years ago

Four gases were combined in a gas cylinder with these partial pressures: 3. 5 atm N2, 2. 8 atm O2, 0. 25 atm Ar, and 0. 15 atm H

aksik [14]

The total pressure of the gas has been 11.9 atm.

The partial pressure has been the pressure exerted by the individual gas in the mixture.

According to the Dalton's law of Partial pressure, the pressure of the gas has been the sum of the partial pressure of each gas in the mixture.

<h3 /><h3>Computation for the pressure of gas</h3>

The given gas has partial pressure of Nitrogen, $P_{N_2}=3.5\;\rm atm$

The partial pressure of Oxygen, $P_{O_2}=8\;\rm atm$

The partial pressure of Argon, $P_{Ar}=0.25\;\rm atm$

The partial pressure of Helium, $P_{He}=0.15\;\rm atm$

The total pressure, (<em>P</em>) of the gas has been given as:

$P=P_{N_2}\;+\;P_{O_2}\;+\;P_{Ar}\;+\;P_{He}\\
P=3.5\;+8\;+\;0.25\;+\;0.15\;\text{atm}\\
P=11.9\;\rm atm$

The total pressure of the gas has been 11.9 atm.

Learn more about the vapor pressure, here:

brainly.com/question/25356241

7 0

3 years ago

What does 2,3-dibromopentane look like?

Shtirlitz [24]

Answer:

The answer to your question is below

Explanation:

Process

1.- To draw an organic molecule, start from the end of the name (pentane)

Pentane has 5 carbons.

2.- Assign numbers the carbons, you can start from the left or to the right

3.- Attach the branches (bromine) in positions 2 and 3

6 0

3 years ago

Please help me with this problem.

brilliants [131]

1 μL = 10^-6 L by definition

So...
82 μL = 82x10^-6 L = 8.2x10^-5 L

3 0

3 years ago