Proteins catalyze reactions, part of the immune system, transport molecules such as oxygen, and transmit messages from cell to cell.
Proteins are very large molecules made of basic units known as aminoacids. Proteins consist of carbon (C), hydrogen (H), nitrogen (N), oxygen (O), and sulfur (S).
Protein molecules are produced by twisted and folded strands of amino acids. Proteins are actively involved in the most important as well as basic aspects of life. These include metabolism, cellular communication, movement, molecular recognition, and defense.
The shape of structural proteins allows them to form essential structures of the body. Collagen holds most of the body tissues together, a protein with a fiber shape. Structural protein Keratin creates a network of waterproof fibers on the outer layer of the skin.
The shape of functional proteins enables them to contribute to the chemical processes of the body. Functional proteins include cell membrane receptors, hormones, growth factors, and enzymes.
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Answer:
true
Explanation:
k12
7.4x10^23 = molecules of silver nitrate sample
6.022x10^23 number of molecules per mole (Avogadro's number)
Divide molecules of AgNO3 by # of molecules per mol
7.4/6.022 = 1.229 mols AgNO3 (Sig Figs would put this at 1.3)
(I leave off the x10^23 because they both will divide out)
Use your periodic table to find the molar weight of silver nitrate.
107.868(Ag) + 14(N) + 3(16[O]) = 169.868g/mol AgNO3
Now multiply your moles of AgNO3 with your molar weight of AgNO3
1.229mol x 169.868g/mol = 208.767g AgNO3
To find the grams in 7.4 x 10^23 molecules of H2SO4, you calculate the molar mass of H2SO4, convert the number of molecules into moles, and then multiply the moles by the molar mass to get the mass in grams. The final answer is 120.74 grams.
To find the mass of 7.4 x 1023 molecules of H2SO4, we first need to know the molar mass of H2SO4 (1 mole = 6.02 x 1023 molecules). The molar mass can be calculated as follows: (2*1.008) + 32.06 + (4*16.00) = 98.09 g/mole. Then, we use the given number of molecules to find the number of moles, which is (7.4 x 1023) / (6.02 x 1023) = 1.23 moles. Finally, we calculate the mass by multiplying the moles by the molar mass, resulting in 1.23 * 98.09 = 120.74 grams.
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Answer : The atomic models that belongs to the same element are atomic model 2 and 3. (Shown below)
Explanation :
As we know that an atom is the smallest unit of a matter that consist of three subatomic particles which are electrons, protons and neutrons.
The protons and the neutrons are located inside the nucleus or center of the nucleus where the mass of the an atom is concentrated and the electrons are located around the nucleus.
The protons are positively charged, the electrons are negatively charged and the neutrons are neutral that means it has no charge.
Atomic number is defined as the number of protons or number of electrons.
Atomic number = number of protons = number of electrons
Same element has same number of protons.
Atomic model 1 : In this model, there are 8 number of electrons, 8 number of protons and 8 number of neutrons.
Atomic model 2 : In this model, there are 5 number of electrons, 5 number of protons and 6 number of neutrons.
Atomic model 3 : In this model, there are 5 number of electrons, 5 number of protons and 5 number of neutrons.
Atomic model 4 : In this model, there are 6 number of electrons, 6 number of protons and 6 number of neutrons.
From this we conclude that, the atomic model 2 and 3 has same number of protons. So, these two models belongs to the same element.
Hence, the atomic models that belongs to the same element are atomic model 2 and 3. (Shown below)
Answer:
the one in the top right corner and the one in the bottom left corner
Explanation: