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postnew [5]
3 years ago
9

What are elements in the tall columns of the periodic table called?

Chemistry
2 answers:
mihalych1998 [28]3 years ago
6 0
They are called representative elements. 
velikii [3]3 years ago
6 0
Representative elements is the answer.
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A 15.6 grams of ethanol absorb 868 J as it is heated. The initial temperature is 21.5 degrees Celsius. What is the final tempera
77julia77 [94]
You have to use the equation q=mcΔT and solve for T(final).  
T(final)=(q/mc)+T(initial)
q=the amount of energy absorbed or released (in this case 868J)
m=the mass of the sample (in this case 15.6g)
c= the specific heat capacity of the substance (in this case 2.41 J/g°C)
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When you plug everything in, you should get 44.6°C.
Therefore the final temperature of ethanol is 44.6°C

I hope this helps.  Let me know if anything is unclear.
3 0
3 years ago
If a chemist wants to make 1.3 L of 0.25 M solution of KOH by diluting a stock solution of 0.675 M KOH, how many milliliters of
anzhelika [568]

To solve this we use the equation,

 

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8 0
3 years ago
Please actually help me.<br> Thank you!
ExtremeBDS [4]

Answer:

I say 20 is ur best option

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azamat
This is most likely "-100 kj/mol, spontaneous," but the question is difficult to read
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Read 2 more answers
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Cloud [144]

Answer:

they have different mass numbers

Explanation:

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