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BaLLatris [955]
3 years ago
7

Scientists Pam and Alejandro were discussing a liquid found in the science lab that was missing it's label. In classifying the u

nknown liquid, they first needed to determine if the liquid is a mixture or pure substance. How is a pure substance different from a mixture
Mixtures cannot be separated by physical means.


A pure substance is heterogeneous.


Pure substances cannot be separated by physical means.


A mixture is made of one substance.
Chemistry
1 answer:
Marat540 [252]3 years ago
6 0

The correct answer is option C. Pure substances cannot be separated by physical means.

Matter is composed of mixtures and pure substances. Pure substances can be further simplified into elements and compounds. Mixtures are physically combined of different components. Pure substances cannot be separated by physical means whereas mixtures can be separated by physical means such as decantation, sedimentation, filtration, distillation and more.

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Answer:

l=3.5*10^{-10}m

Explanation:

From the question we are told that:

1st Energy     E_1=12eV=4(3eV)

2nd Energy  E_2=27eV=9(3eV)

3rd Energy   E_3=48eV=16(3eV)

 

Generally the equation for Energy E for electron in one dimensional box at ground state E_0 is mathematically given by

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  E_0=\frac{h}{8ml^2}

Therefore Length a is mathematically given as

l=\sqrt{\frac{h^2}{8mE_0} }

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Answer:

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The sun is the source of energy that provides the boost for electrons during photosynthesis

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Answer/Explanation:

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<h3>What is radiation weighting factor?</h3>

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Risk of first person with respect to second person = 20/2 = 10 times higher

Learn more about radiation factor here: brainly.com/question/24039736

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