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____ [38]
3 years ago
7

What is hardest type of coal?

Chemistry
2 answers:
cricket20 [7]3 years ago
7 0
<span>Anthracite is the hardest type of coal.</span>
Veronika [31]3 years ago
7 0
Anthracite is the hardest type of coal
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Which element is a noble gas?<br><br> A. H<br> B. Ko<br> C. Xx<br> D. Ar<br> E. O
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Functional groups create ____________ sites in molecules. The polar part of a molecule that can hydrogen bond to water is said b
zhenek [66]

Functional groups create reactive sites in molecules.

The polar part of a molecule that can hydrogen bond to water is said be hydrophilic.

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(carbon will have less electronic density, which is attracted by the more electronegative heretoatoms, and it will tend to attract electron rich chemical species, and in this situation we say that the carbon atom is electrophilic).

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3 years ago
the density of an object is 4.78 g/ml . if the object has a mass of 2.34. determine the volume of the object
laila [671]

Answer:

<h3>The answer is 0.49 mL</h3>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density} \\

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mass = 2.34 g

density = 4.78 g/mL

We have

volume =  \frac{2.34}{4.78}  \\  = 0.4895397...

We have the final answer as

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Hope this helps you

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2 years ago
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