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stira [4]
3 years ago
6

Pls i have a chemistry test answers asap :'(​

Chemistry
1 answer:
Wittaler [7]3 years ago
6 0

Answer:

in the wire last one is right

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Explain how human activity can affect the carbon cycle.
Eva8 [605]

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              Human activities badly affect carbon cycle. Activities such as burning fossil fuel and deforestation have begun to effect on carbon cycle and the rise of carbon dioxide in atmosphere.

Explanation:

                   The carbon cycle can be affect when carbon dioxide is either released into atmosphere or remove from atmosphere. When fossil are burnt , carbon is release to the atmosphere at faster rate then it is removed. Natural gas, oil, coal, and other industrial products all are affecting carbon cycle in atmosphere.

                     Deforestation means permanent removal of trees from forest which cause increase in level of carbon dioxide because no trees longer to absorb carbon dioxide from atmosphere. Which result affect on carbon cycle.


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3 years ago
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The study of the composition of matter is?
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Chemistry. More specifically, analytical chemistry.

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Why are physical properties such as hardness or cleavage useful to geologists when identify minerals?
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Answer:

Physical properties are controlled by the mineral's chemical composition and atomic structure, this combination is distinct in each mineral.

Explanation:

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Since the physical properties depend on the mineral's chemical composition and the atomic structure (molecular arrangement), we can distinguish different minerals by measuring out hardness, cleavage and other properties in order to analyze their behavior under several conditions and subsequently  use them in a particular application.

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what is the difference between the number of electrons in an atom of selenium, Se and the number of electrons in an atom of alum
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