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3 years ago

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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Calculate the specific heat of the substance if 373 J is required to raise the temperature of a 312 gram sample by 25°C?

I am Lyosha [343]

Explanation:

Q = 373J

∆∅ = 25°C

m = 312g

c = x

Q = mc∆∅

373 = 312(x)(25)

373 = 7800x

x = 373/7800

x = 0.0478J/(g°C)

4 0

3 years ago

Use the words to complete the sentences. use each word one time

svlad2 [7]

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2 years ago

Lead(II) nitrate, Pb(NO3)2, and potassium iodide, KI net ionic equation:

MissTica

Answer:

Pb²⁺ (aq) + 2I⁻ (aq) → PbI₂ (s)

General Formulas and Concepts:

Solubility Rules
Reaction Prediction

Explanation:

Step 1: RxN

Pb(NO₃)₂ (aq) + KI (aq) → PbI₂ (s) + KNO₃ (aq)

Step 2: Balance RxN

Pb(NO₃)₂ (aq) + 2KI (aq) → PbI₂ (s) + 2KNO₃ (aq)

Step 3: Ionic Equations

Total Ionic Equation:

Pb²⁺ (aq) + 2NO₃⁻ (aq) + 2K⁺ (aq) + 2I⁻ (aq) → PbI₂ (s) + 2K⁺ (aq) + 2NO₃⁻ (aq)

Cancel out spectator ions.

Net Ionic Equation:

Pb²⁺ (aq) + 2I⁻ (aq) → PbI₂ (s)

7 0

2 years ago

How many liters of a 6.0 M solution of acetic acid contain 0.0030 moles

fenix001 [56]

Answer: Least Common Multiplier of a6m, 0.003 moles 0.01elamos

Steps 6m, 0.003 moles

Compute an expression comprised of Factors that appear either in a6m or 0.003 moles

= 0.018elamos

Explanation:

5 0

2 years ago

Consider the following redox equation Mn(OH)2(s) + MnO4 –(aq)  MnO42 –(aq) (basic solution) When the equation is balanced with

inysia [295]

Answer : The balanced chemical equation is,

$2MnO_4^-(aq)+Mn(OH)_2(s)+4OH^-(aq)\rightarrow 3MnO_4^{2-}(aq)+2H_2O(l)$

The coefficient for $OH^-$ is, 4 and on reactant side of the equation $OH^-(aq)$ is present.

Explanation :

Rules for the balanced chemical equation in basic solution are :

First we have to write into the two half-reactions.
Now balance the main atoms in the reaction.
Now balance the hydrogen and oxygen atoms on both the sides of the reaction.
If the oxygen atoms are not balanced on both the sides then adding water molecules at that side where the more number of oxygen are present.
If the hydrogen atoms are not balanced on both the sides then adding hydroxide ion $(OH^-)$ at that side where the less number of hydrogen are present.
Now balance the charge.

The half reactions in the basic solution are :

Reduction : $Mn(OH)_2(s)+1e^-\rightarrow MnO_4^{2-}(aq)$ ......(1)

Oxidation : $MnO_4^-(aq)+4OH^-(aq)\rightarrow MnO_4^{2-}(aq)+2H_2O(l)+2e^-$ .....(2)

Now multiply the equation (1) by 2 and then added both equation, we get the balanced redox reaction.

The balanced chemical equation in a basic solution will be,

$2MnO_4^-(aq)+Mn(OH)_2(s)+4OH^-(aq)\rightarrow 3MnO_4^{2-}(aq)+2H_2O(l)$

Thus, the coefficient for $OH^-$ is, 4 and on reactant side of the equation $OH^-(aq)$ is present.

6 0

2 years ago