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Nitella [24]
3 years ago
5

Determine the ratio of amount NaOH reacting per unit amount FeCl3. Enter an integer that represents x mol NaOH/1 mol FeCl3.

Chemistry
1 answer:
earnstyle [38]3 years ago
8 0
Answer is: the ratio of amount NaOH reacting per unit amount FeCl₃ is 3 mol NaOH /1 mol FeCl₃.

Balanced chemical reaction:
3NaOH(aq) + FeCl₃(aq) → 3NaCl(aq) + Fe(OH)₃(s).
NaOH is sodium hydroxide.
FeCl₃ is iron(III) chloride.
Coefficient for sodium hydroxide is three and for iron(III hydroxide is one.
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Which element has a grater atomic radius ?phosphorus or bismuth?
LuckyWell [14K]

According to periodic trends, bismuth has the greatest atomic radius.

6 0
3 years ago
Write the ground state electron configuration of zn using the noble-gas shorthand notation.
V125BC [204]
Atomic Number of Zinc is 30, means it contains 30 electrons. So, its electronic configuration is as follow,

                                    1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰
As,
          1s², 2s², 2p⁶, 3s², 3p⁶  =  Argon
So,
Electronic configuration of Zinc in shorthand notation is as follow,

                                     [Ar] 4s², 3d¹⁰
8 0
3 years ago
How many grams of sodium fluoride should be added to 300. mL of 0.0310 M of hydrofluoric acid to produce a buffer solution with
Kisachek [45]

Answer : The mass of sodium fluoride added should be 0.105 grams.

Explanation : Given,

The dissociation constant for HF = K_a=6.8\times 10^{-4}

Concentration of HF (weak acid)= 0.0310 M

First we have to calculate the value of pK_a.

The expression used for the calculation of pK_a is,

pK_a=-\log (K_a)

Now put the value of K_a in this expression, we get:

pK_a=-\log (6.8\times 10^{-4})

pK_a=4-\log (6.8)

pK_a=3.17

Now we have to calculate the concentration of NaF.

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[Salt]}{[Acid]}

pH=pK_a+\log \frac{[NaF]}{[HF]}

Now put all the given values in this expression, we get:

2.60=3.17+\log (\frac{[NaF]}{0.0310})

[NaF]=0.00834M

Now we have to calculate the moles of NaF.

\text{Moles of NaF}=\text{Concentration of NaF}\times \text{Volume of solution}=0.00834M\times 0.300L=0.0025mole

Now we have to calculate the mass of NaF.

\text{Mass of }NaF=\text{Moles of }NaF\times \text{Molar mass of }NaF=0.0025mole\times 42g/mole=0.105g

Therefore, the mass of sodium fluoride added should be 0.105 grams.

4 0
3 years ago
What is meant by the following statement?
Yanka [14]

Answer:

D.

Explanation:

Inverse and proportional means as one goes up the other goes up or if one goes down the other goes down.

- Hope that helped! Please let me know if you need further explanation.

6 0
4 years ago
Read 2 more answers
The atomic number of an element:
Aleonysh [2.5K]

Answer:

I think #3 might be the answer .

Because in #1 atomic mass tells mass .

#4 Atomic number doesnot only tell about the electrons atom has

6 0
3 years ago
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