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Vedmedyk [2.9K]
3 years ago
7

Interesting facts about coal

Chemistry
2 answers:
babunello [35]3 years ago
8 0
Coal will eventually run out as it is an non-renewable energy. these are when they cannot be reproduced to make more,unlike would as u can replant them to create trees
Delicious77 [7]3 years ago
7 0
Coal is made of carbon<span> and also has more elements like </span>hydrogen<span>, </span>oxygen<span>, sulfur and </span>nitrogen<span>.
</span>Coal starts as plant matter at the bottom of ocean/water<span>. Eventually it is covered and buried by sediments where over a while, metamorphosis (a change in form) happens.
</span><span>Coal is also one of the biggest, if not the largest, source of energy for the making of electricity.</span>
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Is usually categorized to a specific area in the state known as a soil series
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Answer:

Soil series as established by the National Cooperative Soil Survey of the United States Department of Agriculture (USDA) Natural Resources Conservation Service are a level of classification in the USDA Soil Taxonomy classification system hierarchy. The actual object of classification is the so-called soil individual, or pedon.[1] Soil series consist of pedons that are grouped together because of their similar pedogenesis, soil chemistry, and physical properties. More specifically, each series consists of pedons having soil horizons that are similar in soil color, soil texture, soil structure, soil pH, consistence, mineral and chemical composition, and arrangement in the soil profile.[2] These result in soils which perform similarly for land use purposes.

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3 years ago
Which type of ion usually undergoes reduction?
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Fluorite is..
denpristay [2]

Fluorite is harder than gypsum but softer than apatite. Thus, the correct option is B.

<h3>What is the hardness of any element?</h3>

The hardness of any element may be defined as the capability of a material to oppose the process of deformation and remains in actual shape precisely.  

According to the table of hardness scales by Mohs, the increasing order of given hardness of given elements is as follows:

Gypsum < Fluorite < Apatite.

Therefore, Fluorite is harder than gypsum but softer than apatite. Thus, the correct option is B.

To learn more about the Hardness of elements, refer to the link:

brainly.com/question/23721736

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