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Alex Ar [27]
3 years ago
6

Which lists the elements in order from most conductive to least conductive?

Chemistry
2 answers:
garik1379 [7]3 years ago
4 0

Answer:

d

Explanation:

potassium is a metal, germanium is a metalloid, and selenium is a nonmetal.

Zinaida [17]3 years ago
4 0

Answer:

D.potassium (K), germanium (Ge), selenium (Se)

Explanation:

Edgenuity

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This is categorized as a combustion reaction.
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What mass in grams would 5.7L of hydrogen gas occupy at STP?​
tekilochka [14]

Answer:  The correct answer is:  " 0.54 g " .

__________________________________________

Explanation:

Note that "hydrogen gas" is:  

H₂ (g)  ;   that is:  a "diatomic element" (diatomic gas) ;

_________________________________________

The molecular weight of "H" is:  1.00794 g ;

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So, the molecular weight of:  H₂ (g)  is:

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Note the conversion for a gas at STP:

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  1 mol of a gas = 22.4 L gas;

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i.e. " 1 mol / 22.4 L " ;

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So:     " 5.7 L H₂ (g)  *  \frac{1 mol H_{2} }{22.4 L} *\frac{2.01588 g}{mol} =? ;

The "L" ("literes" cancel out to "1" ;  since "L/L = 1 ;

The "mol" (moles) cancel out to "1" ; since "mol/mol = 1 ;

____

and we are left with:

____

 [5.7 * 2.104588 g ] / 22.4  =  ?  g ;

______________________

→ [ 11.9961516  g ] / 22.4 =

          0.53554248214  g ;l

_____________________________

We round this value to:  " 0.54 g " ;

 → since "5.7 L " has 2 (two) significant figures;  

     22.4 is an exact number conversion;

     and "5.7 L" has fewer significant figures than:

    " 2.104588 " ; or:  " 1.00794 " .

  → as such: We round to "2 (two) significant figures."

______________________________

Hope this is helpful.  Wishing you the best in your academic endeavors!

_______________________________

8 0
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#4 only plss and huryy ​
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Answer:C

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Hellppppppppplplllppp
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Answer:

the third one because oceans don't affect the weather  

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