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lawyer [7]
3 years ago
7

Which of the following is the conjugate base of phosphoric acid? *

Chemistry
1 answer:
Crazy boy [7]3 years ago
8 0

Answer:

H2PO4 is the conjugate base of phosphoric acid.

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The volume of a single platinum atom is 1.12×10-23 cm3. what is the volume of a platinum atom in microliters?
Dvinal [7]
Basically, this problem asks you to convert units of volume from cm³ to μL. Cubic centimeters is the cubic volume equivalent of milliliters or mL. According to the metric system for L, microliter is 10⁻⁶ of a liter, while milliliter is 10⁻³ of a liter. Therefore, the solution is written as

(1.12×10⁻²³ cm³)*(1 mL/1 cm³)*(10⁻³ L/ 1 mL)*(1μL/10⁻⁶ L) = 1.12×10⁻²⁰ μL
4 0
3 years ago
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Which of these statements is true about chemical reaction rates?
Lena [83]

Answer:

A. the reaction rates can change

Explanation:

It can change depending on the the factor and affect

6 0
3 years ago
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Calculate the value of Key in the following reaction if the equilibrium concentrations are
MAXImum [283]

Answer:

The value of the equilibrium constant Kc is 5.45

Explanation:

The "Law of Mass Action" states:

"For a reversible reaction in chemical equilibrium at a given temperature, it is true that the product of the concentrations of the products raised to the stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients is a constant."

This constant was called the equilibrium constant. For a reaction:

aA + bB ⇄ cC + dD

the equilibrium constant Kc is:

Kc=\frac{[C]^{c} *[D]^{d} }{[A]^{a} *[B]^{b} }

In this case, the balanced reaction is:

2 H₂S → 2 H₂ + S₂

So, the equilibrium constant Kc is:

Kc=\frac{[H_{2} ]^{2} *[S_{2} ] }{[H_{2} S]^{2}  }

The equilibrium concentrations are

  • [H₂S] =0.25 M
  • [H₂]= 0.88 M
  • [S₂]= 0.44M

Replacing in the definition of equilibrium constant:

Kc=\frac{(0.88 M)^{2} *0.44 M }{(0.25 M)^{2}  }

Solving:

Kc= 5.45

<u><em>The value of the equilibrium constant Kc is 5.45</em></u>

<u><em></em></u>

7 0
2 years ago
Halppp can anyone come up with a slogan for anti smoking
PtichkaEL [24]

Answer:

"Your Choice: Liberation From Your Own Choices or Continue the Choice That Decreases Your Liberation."

Explanation:

Liberation is the freeing or release from something restraining you. In this case, smoking holds you back from doing the things you used to do.

It's not that creative, but I hope this is good enough for you! :D (don't smoke)

5 0
2 years ago
Identify the oxidizing and reducing agent in the following reaction, and determine which element is oxidized and which is reduce
erma4kov [3.2K]

Answer:

Explanation:

Fe⁺²(aq) + ClO₂(aq) → Fe⁺³(aq) + ClO₂⁻(aq)

Here oxidation number of Fe is increased from +2 to +3 , so Fe is oxidised .

The oxidation number of Cl is reduced from + 4 to +3  so Cl is reduced .

So ClO₂(aq) is oxidising agent and Fe⁺²(aq) is reducing agent .

8 0
3 years ago
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