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Vesna [10]
3 years ago
6

Which of the following explains why there are so many differences in the properties of peptides and proteins? a) Several amino a

cid sequences are possible for proteins and peptides b) some proteins are enzymes while others are not c) proteins and peptides include nitrogen d) amino acids form proteins and peptides
Chemistry
1 answer:
MatroZZZ [7]3 years ago
8 0
I think the answer is a). While though peptides and proteins are formed by amino acids. But the proteins have more complex structure than peptided and this leads to the higher function of proteins over peptides.
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What is the total number of moles of solute in 0.7 liters of a 4.4 M solution of NaCl
Leokris [45]

Answer:

answer will be 3.08 mol ig.....

3 0
2 years ago
Which of these features is usually found where mountains exist next to the ocean?
Doss [256]

Fjords are usually found where mountains exist next to the ocean.

So the correct answer is C.

Hope this helps,

Davinia.

8 0
3 years ago
Read 2 more answers
One mole of an ideal gas with a volume of 1.0 L and a pressure of 5.0 atm is allowed to expand isothermally into an evacuated bu
Deffense [45]

Answer:

w= - 1.7173 kJ, q= 1.7173 kJ, q(rev) = 1717.3 J = 1.7173 kJ.

Explanation:

Okay, from the question we are given the information below;

Number of moles, n= 1 mole; initial volume, v(1) = 1.0 litres (L); pressure (p) = 5atm, final volume(v2) = 2.0 Litres(L) ; the workdone, w= not given; the heat, q and q(rev)= not given and the gas was said to expand isothermally.

So, this question is a question from the part of chemistry known as thermodynamics. Therefore, grip yourself we are delving into thermodynamics 'waters' now.

For expansion isothermally; the workdone, w= -nRT ln v2/v1.

Where T= temperature= 25° C = 298 k and R= gas constant.

Therefore; workdone, w = - 1 × 8.314 × 298 × ln(2/1).

Workdone,w= - 1717.32204643. =

- 1717.3 Joules (J).

==> Workdone,w= - 1.7173 kJ.

Then, we are to find q. q can be solved by using the first law of thermodynamics, which by mathematical representation is:

∆U= q + w. Where ∆U= change in internal enegy. Since the question is dealing with isothermal expansion, there is this rule that says for an isothermal expansion ∆U = 0.

Hence, 0 =q + [- 1717.3 Joules (J)].

q=1717.3 J = 1.7173 kJ.

Finally, the q(rev) which is= nRT ln (v2/V1).

q(rev) = 1 × 8.314 × 298 ln (2/1).

q(rev) = 1717.3 J = 1.7173 kJ.

PS: please note the negative signs in the workdone and the positive sign in the q(rev).

7 0
3 years ago
The period 4 alkaline-earth metal has the name_______ . An isotope of this element having 20 neutrons has amass numberof _______
Cerrena [4.2K]

Answer:

The period 4 alkaline-earth metal has the name Calcium. An isotope of this element having 20 neutrons has a mass number of 40.

Explanation:

Looking at the periodic table 4th row for the alkaline-earth metal, we can find Calcium which has an atomic number of 20 (or protons number, or z). The mass number is given by the sum of protons and neutrons. If the number of protons in this case is 20 and the number of neutrons is also 20, the mass number A = 40.

6 0
3 years ago
Which of these elements would form an ionic bond between them?
Pepsi [2]
C. Ca and Br because they're metals and nonmetals
6 0
3 years ago
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