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kolezko [41]
4 years ago
8

Describe the composition of common amino acids.

Chemistry
2 answers:
zzz [600]4 years ago
6 0

Answer:

Explanation:

Amino acids consist of an amine (-NH2) group and a carboxyl acid (-COOH) group. So they have elements such as Nitrogen (N), Hydrogen (H), Carbon (C) and Oxygen (O).

kati45 [8]4 years ago
3 0

Amino acid composition:

  1. Nitrogen
  2. Carbon
  3. Hydrogen
  4. Oxygen

The human body has 20 amino acids which are all important but there are only 9 that are essential for the human body.

Best of Luck!

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frez [133]
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7 0
4 years ago
Describe the redox reaction. Check all that apply 2AI(s) + 3ZnCI2(g) → 3Zn(s) + 2AICI3(aq).
Inga [223]

Answer:

Zinc is reduced.

The oxidation number of chlorine does not change.

Aluminum is oxidized.

Explanation:

  • For the reaction:

<em>2AI(s) + 3ZnCI₂(g) → 3Zn(s) + 2AICI₃(aq). </em>

<em></em>

  • For the elements in the reactants side:

Al has (0) oxidation state and converted to (+3) oxidation state in the products (AlCl₃), which means Al is oxidized and it is the reducing agent.

So, we can check that: Aluminum is oxidized.

Zn has the oxidation state (+2) in the reactants side (ZnCl₂) and converted to (0) in the products side (Zn), which means that Zn is reduced and it is the oxidizing agent.

So, we can check that: Zinc is reduced.

<em>and can not check: Zinc is the reducing agent.  </em>

<em />

The oxidation state of Cl does not change, it is the same in both sides (-1).

So, we can check: The oxidation number of chlorine does not change.

<em>and can not check: Aluminum atoms transfer electrons to chlorine atoms. </em>

<em />

  • So, the choices will be:

<em>Zinc is reduced.</em>

<em>The oxidation number of chlorine does not change.</em>

<em>Aluminum is oxidized. </em>

4 0
4 years ago
Read 2 more answers
A bar of gold is 5.0mm thick, 10.0cm long and 2.0cm wide. It has a mass of exactly 193.0g. What is the desity of gold?
Tanzania [10]
<h3>Answer:</h3>

19.3 g/cm³

<h3>Explanation:</h3>

Density of a substance refers to the mass of the substance per unit volume.

Therefore, Density = Mass ÷ Volume

In this case, we are given;

Mass of the gold bar = 193.0 g

Dimensions of the Gold bar = 5.00 mm by 10.0 cm by 2.0 cm

We are required to get the density of the gold bar

Step 1: Volume of the gold bar

Volume is given by, Length × width × height

Volume =  0.50 cm × 10.0 cm × 2.0 cm

             = 10 cm³

Step 2: Density of the gold bar

Density = Mass ÷ volume

Density of the gold bar = 193.0 g ÷ 10 cm³

                                      = 19.3 g/cm³

Thus, the density of the gold bar is 19.3 g/cm³

3 0
3 years ago
 What are some Nonliving things with each characteristic
bezimeni [28]

say, a fridge is a nonliving thing. but its characteristic is that it keeps food cold and hold the food (I think that's what you mean)
6 0
4 years ago
The density of water is 1.00g/cm3. Express this density in lb/m3​
Ira Lisetskai [31]

Answer:  2205 lb/m^3

Explanation:  

  • 1g = 0.002205lb
  • 1cm^3 = 1x10^-6m^3

Convert:  (1g/cm^3)*(0.002205lb/g)*(1cm^3/1x10^-6m^3) = 2205 lb/m^3

           

4 0
3 years ago
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