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sladkih [1.3K]
4 years ago
14

What harmful rays does the atmosphere block?

Chemistry
2 answers:
Kay [80]4 years ago
8 0

Answer: UV-C and UV-B are harmful rays the atmosphere blocks

iogann1982 [59]4 years ago
5 0

ANSWER: UV rays from the sun.

The Ozone layer blocks those rays.

Hope this helps!

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Loren is examining a hair found at a crime scene. He notes radical changes in the coloring of the hair. What is the term for thi
nordsb [41]

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Granules of the hair cortex.

Explanation:

<h2>hope it helpfully...</h2>
4 0
3 years ago
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A change that produces one or more ___________________ is a chemical change or chemical reaction.
Arada [10]

Answer:

A change that produces one or more new substances is a chemical change or chemical reaction.

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The distribution of Na+ ions across a typical biological membrane is 10 mmol dm-3 inside the cell and 140 mmol dm-3 outside the
trasher [3.6K]

Answer :  The value of \Delta G^o across the membrane is 6.80 kJ/mol

Explanation :

The relation between the equilibrium constant and standard Gibbs free energy is:

\Delta G^o=-RT\times \ln K_{eq}\\\\\Delta G^o=-RT\times \ln (\frac{C_{in}}{C_{out}})

where,

\Delta G^o = standard Gibbs free energy  = ?

R = gas constant = 8.314 J/K.mol

T = temperature = 37^oC=273+37=310K

K_{eq}  = equilibrium constant

C_{in} = concentration inside the cell = 10mmol.dm^{3-}

C_{out} = concentration outside the cell = 140mmol.dm^{3-}

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

\Delta G^o=-RT\times \ln (\frac{C_{in}}{C_{out}})

\Delta G^o=-(8.314J/K.mol)\times (310K)\times \ln (\frac{10mmol.dm^{3-}}{140mmol.dm^{3-}})

\Delta G^o=6.80\times 10^{3}J/mol=6.80kJ/mol

Thus, the value of \Delta G^o across the membrane is 6.80 kJ/mol

8 0
3 years ago
Could someone please help me with this chemistry question I will mark the correct answer as brainliest
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It is 95% ethanol and 5%water
I’m pretty sure hope you get it right!
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The government is exploring many new green technologies in order to produce energy. One example is the wind turbine. As the wind
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Kinetic energy to potential energy.

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