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deff fn [24]
3 years ago
12

The primary role of the carbonic-acid-bicarbonate buffer system is to

Chemistry
1 answer:
tekilochka [14]3 years ago
4 0

Answer:

The primary role of the carbonic-acid-bicarbonate buffer system is to neutralize the hydronium ions forming carbonic acid and water when any acidic substance enter the bloodstream.

Explanation:

hope it helps.

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An example of a double displacement is
mestny [16]

Answer:

D. AX + BY -> AY + BX

Explanation:

Double replacement:

It is the reaction in which two compound exchange their ions and form new compounds.

AB + CD → AC +BD

So from given list of reactions option D is correct while others are incorrect.

Other examples:

The reaction between sodium chloride and silver nitrate is double displacement reaction.

NaCl + AgNO₃   →  AgCl + NaNO₃

The anion and cations of both reactants exchange. The anion of sodium chloride (Cl⁻) combine with cation of silver nitrate (Ag⁺)  and form AgCl. While Anion of silver nitrate combine with cation of sodium chloride and form sodium nitrate.

3 0
3 years ago
Identify the element that cannot participate in nuclear fission reactions. (Hint: Think about the size of the atom.)
chubhunter [2.5K]
A or C I’m pretty sure
8 0
3 years ago
Making the simplistic assumption that the dissolved NaCl(s) does not affect the volume of the solvent water, determine the const
shtirl [24]

Answer:

  • m = 1,000/58.5
  • b = - 1,000 / 58.5

1) Variables

  • molarity: M
  • density of the solution: d
  • moles of NaCl: n₁
  • mass of NaCl: m₁
  • molar mass of NaCl: MM₁
  • total volume in liters: Vt
  • Volume of water in mililiters: V₂
  • mass of water: m₂

2) Density of the solution: mass in grams / volume in mililiters

  • d = [m₁ + m₂] / (1000Vt)

3) Mass of NaCl: m₁

    Number of moles = mass in grams / molar mass

    ⇒ mass in grams = number of moles × molar mass

        m₁ = n₁ × MM₁


4) Number of moles of NaCl: n₁

   Molarity = number of moles / Volume of solution in liters

   M = n₁ / Vt

   ⇒ n₁ = M × Vt


5) Substitue in the equation of m₁:

   m₁ = M × Vt × MM₁


6) Substitute in the equation of density:

    d = [M × Vt × MM₁ + m₂] / (1000Vt)


7) Simplify and solve for M

  • d = M × Vt × MM₁ / (1000Vt) + m₂/ (1000Vt)
  • d = M × MM₁ / (1000) + m₂/ (1000Vt)

Making the simplistic assumption that the dissolved NaCl(s) does not affect the volume of the solvent water means 1000Vt = V₂  

  • d = M × MM₁ / (1000) + m₂/ V₂

        m₂/ V₂ is the density of water: 1.00 g/mL

  • d = M × MM₁ / (1000) + 1.00 g/mL
  • M × MM₁ / (1000) = d - 1.00 g/mL
  • M = [1,000/MM₁] d - 1,000/ MM₁

8) Substituting MM₁ = 58.5 g/mol

  • M = [1,000/58.5] d - [1,000/ 58.5]

Comparing with the equation Molarity = m×density + b, you obtain:

  • m = 1,000/58.5
  • b = - 1,000/58.5
7 0
3 years ago
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What term refers to the coldest and densest zone, deep below the surface of a lake?
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Profundal 

profundal zone is the coldest and deepest zone 
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Change for a liquid state to a solid state is known as what phase change?
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Answer:

B. To change from a liquid state to a solid state is called Freezing

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2 years ago
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