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leva [86]
3 years ago
8

If you fill this out 20 points, but I need all the answers

Chemistry
1 answer:
Rashid [163]3 years ago
6 0

Answer:

Li   3   7   3   4   3

P   15   31   15   16   15

Cl   17   35   17   18   17

Ni   28   59   28   31   28

Ne   10   39   10   29   10

Ag   47   108   47   61   47

H   1   1   1   0   1

Si   14   28   14   14   14  

W   74   184   74   110   74

Ne   10   20   10   10    10

Explanation:

Atomic number and the number of protons are the SAME

number of protons are electrons are the SAME

mass #- protons = Neutrons

Neutrons- mass #= protons

I HAVEN'T DONE THIS IN A WHILE SO I HOPE EVERYTHING IS CORRECT

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when  heat gained = heat lost 

when AL is lost heat and water gain heat

∴ (M*C*ΔT)AL = (M*C*ΔT) water

when M(Al) is the mass of Al= 225g 

C(Al) is the specific heat of Al = 0.9 

ΔT(Al) = (125.5 - Tf) 

and Mw is mass of water  = 500g

Cw is the specific heat of water = 4.81 

ΔT = (Tf - 22.5) 

so by substitution:

∴225* 0.9 * ( 125.5 - Tf) = 500 * 4.81 * (Tf-22.5)

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Which of the following has a melting point greater than room temperature?
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