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wel
3 years ago
8

Which acid-base buffer is most crucial to maintaining homeostasis within the human body?

Chemistry
2 answers:
Andrei [34K]3 years ago
4 0

Answer:

e 2020 a

Explanation:

Igoryamba3 years ago
3 0

it is a i believe: Bicarbonate and carbonic acid (A)

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Food shelter oxygen
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Cho 200 g dung dịch NaCl 0,5M tác dụng hết với 400 ml AgNO3. Sau phản ứng thu được kết tủa và dung dịch không màu
ivolga24 [154]

Answer:

Explanation:

a. NaCl+ AgNO3-----> NaNO3+ AgCl

b. Số mol của NaCl= 0,2*0,5= 0,1 (mol)

------> Số mol của kết tủa AgCl tạo thành= 0,1 mol (dựa vào phương trình hóa học)

-----> Khối lượng của kết tủa AgCl tạo thành= 0,1*143,5=14,35(g)

c. Số mol của AgNO3= số mol của NaCl= 0,1 (mol)

------> Nồng độ mol của dd AgNO3 đã tham gia phản ứng= \frac{0,1}{0,4}=0,25(M)

4 0
2 years ago
What is the molality of a solution that has 4 mol of KCI in 0.800 kg of water
steposvetlana [31]

Answer:

Option A. 4mol/0.800Kg

Explanation:

Data obtained from the question include:

Mole of solute = 4 moles

Mass of water = 0.800Kg

Molality =.?

Molality of a solution is simply defined as the mole of solute per unit kilogram of solvent. Mathematically, it is expressed as:

Molarity = mole of solute / Kg of solvent

With the above formula, we can obtain the molality of KCl solution as follow:

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4 0
3 years ago
Write a chemical equation showing how each behaves as an acid when dissoblbed in water.
nikdorinn [45]

Answer:

a. H₂S(aq) + H₂O(l) ⇄ HS⁻(aq) + H₃O⁺(aq)

b. NH₄⁺(aq) + H₂O(l) ⇄ NH₃(aq) + H₃O⁺(aq)

Explanation:

According to Bronsted-Lowry acid-base theory,

  • An acid is a substance that donates a H⁺.
  • A base is a substance that accepts a H⁺.

a. When dissolved in water, H₂S behaves as an acid according to the following equation.

H₂S(aq) + H₂O(l) ⇄ HS⁻(aq) + H₃O⁺(aq)

b. When dissolved in water, NH₄⁺ behaves as an acid according to the following equation.

NH₄⁺(aq) + H₂O(l) ⇄ NH₃(aq) + H₃O⁺(aq)

8 0
2 years ago
What happens when an acid reacts with a metal such as magnesium?
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