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mezya [45]
3 years ago
11

Which of these substances are compounds? How do you know?

Chemistry
1 answer:
tankabanditka [31]3 years ago
7 0
Salt because it's a solid and helium and nitrogen are gases.
Water is a liquid because it's form can change.
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What is N3I8 chemical compound name?
joja [24]

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When naming molecular compounds prefixes are used to dictate the number of a given element present in the compound. ” mono-” indicates one, “di-” indicates two, “tri-” is three, “tetra-” is four, “penta-” is five, and “hexa-” is six, “hepta-” is seven, “octo-” is eight, “nona-” is nine, and “deca” is ten.

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3 years ago
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Likurg_2 [28]
 <span>mg = 2.42 g 
Tg = 72.2 deg.C 
mw = 15.8 g 
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Energy balance for insulated system, 
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2.42*cg*(72.2 - 27) = 15.8*4.18*(27 - 24.5) 
cg = 1.5095 J/g. deg.C or 1.5095 J/g.K</span><span>
</span>
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