How many valence electrons does Nitrogen have?
1 answer:
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Once upon a time there was a lovely
princess. But she had an enchantment
upon her of a fearful sort which could
only be broken by love's first kiss.
She was locked away in a castle guarded
by a terrible fire-breathing dragon.
Many brave knights had attempted to
free her from this dreadful prison,
but non prevailed. She waited in the
dragon's keep in the highest room of
the tallest tower for her true love
and true love's first kiss. (laughs)
Like that's ever gonna happen. What
a load of - (toilet flush)
Allstar - by Smashmouth begins to play. Shrek goes about his
day. While in a nearby town, the villagers get together to go
after the ogre.
Answer : The correct option is, (A) 300.0 mL of 0.10 M CaCl₂
Explanation :
<u>(a) 300.0 mL of 0.10 M CaCl₂</u>
The dissociation reaction will be:
To calculate the number of moles of CaCl₂ as :
As, 1 mole of CaCl₂ contains ions = 3
So, 0.03 mole of CaCl₂ contains ions = 0.03 × 3 = 0.09 ions.
<u>(b) 400.0 mL of 0.10 M NaCl</u>
The dissociation reaction will be:
To calculate the number of moles of NaCl as :
As, 1 mole of NaCl contains ions = 2
So, 0.04 mole of NaCl contains ions = 0.04 × 2 = 0.08 ions.
<u>(c) 200.0 mL of 0.10 M FeCl₃</u>
The dissociation reaction will be:
To calculate the number of moles of FeCl₃ as :
As, 1 mole of FeCl₃ contains ions = 4
So, 0.02 mole of FeCl₃ contains ions = 0.02 × 4 = 0.08 ions.
<u>(d) 800.0 mL of 0.10 M sucrose</u>
The dissociation of sucrose is not possible because it is a non-electrolyte.
To calculate the number of moles of sucrose as :
As, 1 mole of sucrose contains ions = 1
So, 0.08 mole of sucrose contains ions = 0.08 × 1 = 0.08 ions.
Hence, the solutions contains the greatest number of ions is, 300.0 mL of 0.10 M CaCl₂