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Leokris [45]
3 years ago
15

PLEASE HELP 15 POINTS ONE QUESTION

Chemistry
1 answer:
KIM [24]3 years ago
3 0
Answer: 12 Protons, 12 electrons and 16 neutrons. The number of protons and electrons always stays the same, but the neutrons is the mass-protons. In this case, 28-12=16 neutrons.
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M ( HCl ) = ?

V ( HCl ) = 25.5 mL in liters : 25.5 / 1000 => 0.0255 L

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V ( NaOH ) = 51.2 mL / 1000 => 0.0512 L

number of moles NaOH:

n = M x V

n = 0.113 x <span> 0.0512 => 0.0057856 moles of NaOH

mole ratio:

</span><span>HCl + NaOH = NaCl + H2O
</span><span>
1 mole HCl -------------- 1 mole NaOH
( moles HCl ) ----------- </span><span> 0.0057856 moles NaOH
</span>
(moles HCl ) = <span> 0.0057856 x 1 / 1
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= <span> 0.0057856 moles of HCl
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M ( HCl ) = n / V

M =  0.0057856 / <span>0.0255
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= 0.227 M

Answer A

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