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photoshop1234 [79]
3 years ago
6

Which statement about proteins is true?

Chemistry
2 answers:
Maurinko [17]3 years ago
4 0

Collagen is a structural protein and hemoglobin is a protein involved in the transport of oxygen.

Protein purity and homogeneity are two very important characteristics for further protein studies and biopharmaceutical applications.

https://www.creative-proteomics.com/services/purity-analysis-of-peptides-or-proteins.htm

LenKa [72]3 years ago
3 0
A.) Collagen is a structural protein and hemoglobin is a protein involved in the transport of oxygen. Good Luck
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3 years ago
When 60 mL of 0.22 M NH4Cl is added to 60 mL of 0.22 M NH3, relative to the pH of the 0.10 M NH3 solution the pH of the resultin
densk [106]

Answer:

Will be more acidic

Explanation:

The equilibrium of NH3 in water is:

NH3(aq) + H2O(l) ⇄ NH4⁺(aq) + OH⁻(aq).

Where equilibrium constant, Kb, is:

Kb = 1.85x10⁻⁵ = [NH4⁺] [OH⁻] / [NH3]

From 0.10M NH3, the reaction will produce X of NH4⁺ and X of OH⁻ and Kb will be:

1.85x10⁻⁵ = [X] [X] / [0.10M]

1.8x10⁻⁶ = X²

X = 1.34x10⁻³ = [OH⁻]

As pOH = -log[OH⁻] = 2.87

And as pH = 14 - pOH

pH of the 0.10M NH3 is 11.13

Now, to find the pH of the NH4Cl and NH3 we need to use H-H equation for bases:

pOH = pKb + log [NH4⁺] / [NH3]

<em>Where pKb is -log Kb = 4.74 and [] are moles of both compounds.</em>

<em />

Moles of [NH4⁺] = [NH3] = 60mL, 0.060L*0.22M = 0.0132moles:

pOH = 4.74 + log [0.0132] / [0.0132]

pOH = 4.74

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That means the pH of the resulting solution will be more acidic

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3 years ago
The atmospheric pressure in Denver, Colorado, is usually about 84.00 kPa. What is this pressure in atm and torr units?
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Answer:

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<u>84.00 kPa = 0.831683168 atm</u>

Formula for kPa to atm: for an approximate result, divide the pressure value by 101. <em><u>84/101</u></em>

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