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4 years ago

Look around you and identify five objects. Decide if they are composed of natural or synthetic materials.

Chemistry

1 answer:

Usimov [2.4K]4 years ago

8 0

Answer:

The five objects that are Cherries, rocks, wooden chair( made up of natural material) Soap and nylon cloth ( made from synthetic material)

Explanation:

Natural materials are those made from the physical matter, which has been occurred naturally or from any natural source i.e. plants, animal or from the ground or soil. Synthetic materials are those which are man-made, made from the natural materials but by under-going synthetic process or some chemical treatment under the laboratory condition.

The objects that are found around are:

Cherry- It is plant product and thus a natural material.

Rocks - They are naturally available obtained from the earth's surface.

Wooden chair - This is made from the wood, wood is a natural material.

Soap - Soap is synthetic material made from the fat and alkali in the laboratory.

Nylon cloth - It is made up of polymer, under going various methods under laboratory condition.

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3 years ago

Someone drops a book on the floor, and it makes a loud noise. At that time, you turn to look at the person who dropped the book.

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4 years ago

Help plz:)))I’ll mark u Brainliest

emmasim [6.3K]

Answer:

$\Delta _{fus}H=205J/g=13.03kJ/mol$

Explanation:

Hello there!

In this case, since the heat of fusion is a property that allows us to calculate the heat involved during the change from solid to liquid (fusion) and is calculated as shown below:

$Q=m*\Delta _{fus}H$

In such a way, given the heat involved during this process and the mass of copper, we calculate the heat of fusion as shown below:

$\Delta _{fus}H=\frac{Q}{m}=\frac{41000J}{200.g}\\\\\Delta _{fus}H=205J/g$

Or in kJ/mol:

$\Delta _{fus}H=205\frac{J}{gCu}*\frac{63.546 gCu}{1molCu}\\\\ \Delta _{fus}H=13026.93J/mol=13.03kJ/mol$

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3 years ago

How does hybridization of atomic orbitals allow us to reconcile valence bond theory with vsepr theory?.

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Hybridization of atomic orbitals produces orbital shapes and spatial orientations that correlate to those predicted in VSEPR theory.

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Learn more about VSEPR theory here:

brainly.com/question/14225705

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