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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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Mixing of pure orbitals having nearly equal energy to form equal number of completely new orbitals is said to be hybridization.

For the compound, CH_3CH_2CH_3 the electronic configuration of the atoms, carbon and hydrogen are:

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In excited state: 1s^{2}2s^{1}2p^{3}

Hydrogen (atomic number=1): 1s^{1}

All the bonds in the compound is single bond(\sigma-bond) that is they are formed by head on collision of the orbitals.

The structure of the compound is shown in the image.

The Carbon-Hydrogen bond is formed by overlapping of s-orbital of hydrogen to p-orbital of carbon.

In order to complete the octet the required number of electrons for carbon is 4 and for hydrogen is 1. So, the electron in 1s^{1} of hydrogen will overlap to the 2p^{3}-orbital of carbon.

Thus, the hybridization of Hydrogen is s-hybridization and the hybridization of Carbon is sp^{3}-hybridization.

The hybridization of each atom is shown in the image.

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The one with higher mass has a higher density because it fits more mass into the same amount of space (volume).

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