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dem82 [27]
3 years ago
7

What is the main function of a cell membrane?

Chemistry
2 answers:
Iteru [2.4K]3 years ago
7 0
Allow things in and out and also to block things from entering or exiting
slamgirl [31]3 years ago
6 0
Main function of a cell membrane is to pass molecules (transports molecules) in and out of the cell

Hope this helps!
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A chemist fills a reaction vessel with 7.92 atm nitrogen (N2) gas, 2.02 atm hydrogen (H2) gas, and 2.11 atm ammonia (NH3) gas at
djverab [1.8K]

<u>Answer:</u> The Gibbs free energy of the given reaction is -40 kJ

<u>Explanation:</u>

The given chemical equation follows:

N_2(g)+3H_2(g)\rightarrow 2NH_3(g)

The equation for the standard Gibbs free change of the above reaction is:

\Delta G^o_{rxn}=[(2\times \Delta G^o_f_{(NH_3(g))})]-[(1\times \Delta G^o_f_{(N_2(g))})+(3\times \Delta G^o_f_{(H_2(g))})]

We are given:

\Delta G^o_f_{(NH_3(l))}=-16.45kJ/mol\\\Delta G^o_f_{(H_2(g))}=0kJ/mol\\\Delta G^o_f_{(N_2(g))}=0kJ/mol

Putting values in above equation, we get:

\Delta G^o_{rxn}=[(2\times (-16.45))]-[(1\times (0))+(3\times (0))]\\\\\Delta G^o_{rxn}=-32.9kJ/mol

The equation used to Gibbs free energy of the reaction follows:

\Delta G=\Delta G^o+RT\ln Q_{eq}

where,

\Delta G = free energy of the reaction

\Delta G^o = standard Gibbs free energy = -32.9 kJ/mol = -32900 J/mol  (Conversion factor: 1 kJ = 1000 J)

R = Gas constant = 8.314J/K mol

T = Temperature = 25^oC=[273+25]K=298K

Q_{eq} = Ratio of concentration of products and reactants at any time = \frac{(p_{NH_3})^2}{(p_{H_2})^3\times p_{N_2}}

p_{NH_3}=2.11atm

p_{N_2}=7.92atm

p_{H_2}=2.02atm

Putting values in above equation, we get:

\Delta G=-32900J/mol+(8.314J/K.mol\times 298K\times \ln (\frac{(2.11)^2}{(2.02)^3\times 7.92}))\\\\\Delta G=-39553.04J/mol=--39.55kJ=-40kJ

Hence, the Gibbs free energy of the given reaction is -40 kJ

7 0
3 years ago
Islands have cool and calm weather throughout the year? Why?
saveliy_v [14]
There’s no one around and the breeze from the Ocean makes it cool
8 0
3 years ago
(3.605 X 10^-27) + (4.01 X 10^-25)<br> Answer in scientific notation
Greeley [361]
The answer is 4.04605 X 10^-25
3 0
3 years ago
Pls big test What are openings in the ground that release energy from deep inside the planet? * 1clouds 2volcanoes 3sun 4hurrica
9966 [12]

Answer:

2. Volcanoes

Explanation:

The interior of some planets (e.g earth) contains some hot flowing fluids called lava which has a very high thermal energy. The lava as a means of escaping the confinement within the planet, burst out by creating an opening through the ground to the surface of the planet to release the energy (lava).

This process in which the energy is released to the surface of the planet is termed volcanic eruptions. Which occurs majorly in some susceptible regions of the earth.

The openings in the ground that release energy from deep inside the planet is thus called volcanoes.

8 0
3 years ago
A 2-kg bowling
Volgvan
So for the first one It's 784.56 J (GPE)

For the second one it's KE is equal to 100 J. If you can give me a few more minutes I'll try to get the GPE
6 0
4 years ago
Read 2 more answers
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