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AnnyKZ [126]
3 years ago
9

A 2 mole sample of F2(g) reacts with excess NaOH(aq) according to the equation above. If the reaction is repeated with excess Na

OH(aq) but with 1 mole of F2(g), which of the following is correct?
Group of answer choices

The amount of OF2(g) produced is doubled.

The amount of OF2(g) produced is halved.

The amount of NaF(aq) produced remains the same.

The amount of NaF(aq) produced is doubled.
Chemistry
1 answer:
77julia77 [94]3 years ago
6 0

Answer:

The amount of NaF produced is doubled.

(d) is correct option.

Explanation:

Given that,

A 2 mole sample of F₂ reacts with excess NaOH according to the equation.

The balance equation is

2F_{2}+2NaOH\Rightarrow 2NaF +H_{2}O+OF_{2}

If the reaction is repeated with excess NaOH but with 1 mole of F₂

The balance equation is

F_{2}+2NaOH\Rightarrow 2NaF +2OH

Hence, The amount of NaF produced is doubled.

(d) is correct option.

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a 3.0 M solution of HCl can be prepared from a 12.0 M solution by diluting 30 L of the 12.0 M solution ith suffient distilled wa
Alex_Xolod [135]
<h3>Answer:</h3>

Final volume is 120 L

<h3>Explanation:</h3>
  • Using the dilution concept, dilution involves adding more solvent to a concentrated solution to make it dilute. This results to a dilute solution with less solute concentration and more solvent.

According to the dilution equation;

M1V1 = M2V2

Where, M1 is the molarity  and V1 is the volume of the concentrated solution, while M2 and V2 are the molarity and volume of the diluted solution respectively.

In this case;

M1 = 12.0 M

V1 = 30 L

M2 = 3.0 M

V2 = ?

Therefore;

V2 = M1V1 ÷ M2

    = (12 × 30) ÷ 3

   = 120 L

Hence, the final volume will be 120 liters

6 0
3 years ago
Which of the following are considered physical properties of a substance?
amm1812
What are the options?
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an asrnout in space might fell weighless but there still gravitaional attraction between the astournout and earth . Which to fac
dezoksy [38]

Answer:

When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.

5 0
2 years ago
What is the pH of a 0.0288 M solution of ammonia (Kb 1.8 x 10-5)?
elena-14-01-66 [18.8K]

Answer:

10.86

Explanation:

Given that:

K_{b}=1.8\times 10^{-5}

Concentration = 0.0288 M

Consider the ICE take for the dissociation of ammonia as:

                                      NH₃    +   H₂O    ⇄     NH₄⁺ +    OH⁻

At t=0                          0.0288                             -              -

At t =equilibrium        (0.0288-x)                         x           x            

The expression for dissociation constant of ammonia is:

K_{b}=\frac {\left [ NH_4^{+} \right ]\left [ {OH}^- \right ]}{[NH_3]}

1.8\times 10^{-5}=\frac {x^2}{0.0288-x}

x is very small, so (0.0288 - x) ≅ 0.0288

Solving for x, we get:

x = 7.2×10⁻⁴  M

pOH = -log[OH⁻] = -log(7.2×10⁻⁴) = 3.14

Also,

pH + pOH = 14

So, pH = 10.86

3 0
3 years ago
The pH of blood is 7.35. It is maintained in part by the buffer system composed of carbonic acid (H2CO3) and the bicarbonate (hy
algol [13]

Answer:

b) [bicarbonate]/[carbonic acid] = 9.4

Explanation:

The pH of a buffer system is given by the Henderson-Hasselbach equation:

  • pH = pKa + log ([bicarbonate] / [carbonic acid])

Where pka = -log (Ka) = -log(4.2x10⁻⁷) = 6.38

Now we <u>solve for [bicarbonate] / [carbonic acid]</u>:

  • 7.35 = 6.38 + log ([bicarbonate] / [carbonic acid])
  • 0.97 = log ([bicarbonate] / [carbonic acid])
  • 10^{0.97} = [bicarbonate] / [carbonic acid]
  • [bicarbonate] / [carbonic acid] = 9.33 ≈ 9.4

So the answer is b).

8 0
3 years ago
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