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lapo4ka [179]
3 years ago
10

Read the given equation. 2Na + 2H2O → 2NaOH + H2

Chemistry
2 answers:
PolarNik [594]3 years ago
8 0
<h3>Answer:</h3>

                17.25 g of Na

<h3>Explanation:</h3>

                        The balance chemical equation is as follow,

                              2 Na + 2 H₂O    →    2 NaOH + H₂

As we know that one mole of any Ideal gas at standard temperature and pressure occupies exactly 22.4 dm³ (1 L) volume.

Then, according to equation,

            22.4 L (1 mol) H₂ was produced by  =  46 g (2 mol) of Na

Then,

                     8.40 L H₂ gas will be produced by  =  X g of Na

Solving for X,

                      X =  (8.40 L × 46 g) ÷ 22.4 L

                      X =  17.25 g of Na

Allisa [31]3 years ago
3 0

Answer:

A) 17.2 grams

Explanation:

I took the quiz and A was correct!

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Answer:

Strong Acid

Explanation:

ph 1 to 7 acidic 7 is neutral and onwards till 14 is alkali so in this case its ph is 2 which is a strong acidic

8 0
2 years ago
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about how long does it take for the reaction to reach equilibrium in this concentration versus time graph?
yarga [219]

Answer: option D. 4.5 seconds.


Explanation:


The equilibrium reaction is H₂O ⇄ H₂ + O₂


The chemical equilibrium is a dynamic one. Two reactions are happening symultaneously: the forward reaction (H₂O → H₂ + O₂) ,to the right, and the reverse reaction (H₂O ← H₂ + O₂), to the left. At equilibrium both reactions have the same rate, which makes that the total, measurable quantity of reactants and products remain constant.


In the figure you see:

  • The vertical axis measures concentration.
  • The horizontal axis measures time (seconds).
  • The two blue lines, the concentrations of H₂ and O₂, become flat (reach a zero slope) between 4 and 5 seconds.
  • The red line, the concentration of H₂O, becomes flat, also, between 4 and 5 seconds.
  • Hence, the concentrations of the reactant and the products do not change after that time meaning that the reaction has reached the equilibrium at about 4.5 seconds.


5 0
3 years ago
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Which rigid cylinder contains the same number of gas molecules at STP as a 2.0-liter rigid cylinder containing H2(g) at STP?
Inga [223]
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The answer is (2) 2 L of methane gas. 
4 0
3 years ago
What is the boiling point of a 1.5 m aqueous solution of fructose? the boiling point elevation constant of water is 0.515°c/m.
GREYUIT [131]
Answer is: <span>he boiling point of a 1.5 m aqueous solution of fructose is </span>100.7725°C.
The boiling point elevation is directly proportional to the molality of the solution according to the equation: ΔTb = Kb · b.<span>
ΔTb -  the boiling point elevation.
Kb - the ebullioscopic constant. of water.
b - molality of the solution.
Kb = 0.515</span>°C/m.
b = 1.5 m.
ΔTb = 0.515°C/m · 1.5 m.
ΔTb = 0.7725°C.
Tb(solution) = Tb(water) + ΔTb.
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5 0
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Which of the following would be most likely to experience strong intermolecular forces?
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Answer:

The correct answer is D

Explanation:

Just took quiz

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