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3 years ago

3.45 x 10^20 molecules of sulfur dioxide to miles of sulfur dioxide

1 answer:

8 0

(3.45 x 10^20 molecules of sulfur dioxide ) x $\frac{1 mole sulfur dioxide}{6.022x10^23 molecules sulfur dioxide}$ = 5.73x10^-4 mole of sulfur dioxide

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A phosphate buffer is involved in the formation of urine. The developing urine contains H2PO4 and HPO42- in the same concentrati

Katen [24]

Answer:

The ionization equation is

$H_{2}PO_{4}^{-} +H_{2}O$ ⇄ $HPO_{4}^{-2} +H_{3}O^{+}$ (1)

Explanation:

The ionization equation is

$H_{2}PO_{4}^{-} +H_{2}O$ ⇄ $HPO_{4}^{-2} +H_{3}O^{+}$ (1)

As the Bronsted definition sais, an acid is a substance with the ability to give protons thus, H2PO4 is the acid and HPO42- is the conjugate base.

The Ka expression is the ratio between the concentration of products and reactants of the equilibrium reaction so,

$Ka = \frac{[HPO_{4}^{-2}] [H_{3}O^{+}]}{[H_{2}PO_{4}^{-}] [H_{2}O]} = 6.2x10^{-8}$

The pKa is

$-Log (Ka) = -Log (6.2x10^{-8}) = 7.2$

The pKa of H2CO3 is 6,35, thus this a stronger acid than H2PO4. The higher the pKa of an acid greater the capacity to donate protons.

In the body H2CO3 is a more optimal buffer for regulating pH due to the combination of the two acid-base equilibriums and the two pKa.

If the urine is acidified, according to Le Chatlier's Principle the equilibrium (1) moves to the left neutralizing the excess proton concentration.

3 0

3 years ago

State two conditions necessary for an esterification reaction to take place

nadya68 [22]

Explanation:

Esterification occurs when a carboxylic acid reacts with an alcohol. This reaction can only occur in the presence of an acid catalyst and heat. It takes a lot of energy to remove the -OH from the carboxylic acid, so a catalyst and heat are needed to produce the necessary energy.

4 0

2 years ago

Read 2 more answers

Consider the unbalanced equation for aluminum and oxygen producing aluminum oxide: Al + O₂ → Al₂O₃. Which of the following shows

DIA [1.3K]

Answer:

A answer is correct that help

6 0

3 years ago

Why would aluminum foil be useful in a thermos design

Pie

To be used as a conductor for heat

3 0

2 years ago

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In the chemical reaction below, calcium metal and water react to form calcium hydroxide and hydrogen gas. calcium metal + water

7nadin3 [17]

D. the total mass of the products will be equal to the original mass of the reactants.

Explanation:

Ca + 2H₂O → Ca(OH)₂ + H₂

From this chemical reaction, one can conclude that when the reaction reaches completion, the total mass of the products will be equal to the original mass of the reactants. This is in compliance with the law of conservation of mass.

The law of conservation of mass states that matter is the mass of products in a chemical reaction is the same as mass of the reactants.
This implies that the mass of the products in a given reaction is the same as that of the reactants.
No mass is lost in the process of a chemical change.

Learn more:

law of conservation of mass brainly.com/question/5896850

law of conservation of matter brainly.com/question/2190120

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3 0

3 years ago