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Mars2501 [29]
3 years ago
14

Draw the structure of the Tetrapeptide asp-met-lys-tyr

Chemistry
1 answer:
Bingel [31]3 years ago
6 0

Is this correct sorry if it wrong

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In an acid-base neutralization reaction 38.74 ml of 0.500 m potassium hydroxide reacts with 50.00 ml of sulfuric acid solution.
DaniilM [7]

Answer:

0.2 M.

Explanation:

  • For the acid-base neutralization, we have the role:

The no. of millimoles of acid is equal to that of the base at the neutralization.

<em>∴ (XMV) KOH = (XMV) H₂SO₄.</em>

X is the no. of reproducible H⁺ (for acid) or OH⁻ (for base),

M is the molarity.

V is the volume.

  • For KOH:

X = 1, M = 0.5 M, V = 38.74 mL.

  • For H₂SO₄:

X = 2, M = ??? M, V = 50.0 mL.

∴ M of H₂SO₄ = (XMV) KOH/(XV) H₂SO₄ = (1)(0.5 M)(38.74 mL)/(2)(50.0 mL) = 0.1937 M ≅ 0.2 M.

5 0
3 years ago
Which Group is in the second column of the periodic table?
Misha Larkins [42]

Answer:

Hey there!

That would be the alkaline earth metals.

Hope this helps :)

3 0
3 years ago
Read 2 more answers
Ronaldo experimentally determined the
Yuri [45]

Answer:

Explanation:

%error= error/actual density x100

0.050/0.890  x100

=5.62%

5 0
3 years ago
#15 fill in the following table regarding ions
Natasha_Volkova [10]

Answer:

P^{3-}         Anion      Gained 3         18          

Sr^{2+}       Cation      Lost    2          36

Fe^{3+}       Cation     Lost    3          23

Explanation:

Looking at the ionic notation, the negative symbol (-) indicates that there are more electrons than protons and the positive symbol (+) indicates that there are more protons than electrons.

The number tells you how many was gained or lost.

To determine how many electrons are left, you base this off how many protons there are. The number of protons in an atom is expressed by the atomic number. In a stable atom, you have an equal number of protons and electrons.

Ions occur when electrons are gained or lost.

A cation is positively charged because it LOST an electron. Since there are more protons than electrons, the charge would be positive.

An anion is negatively charged because it gained an electron. Since there are more electrons than protons, the charge would be negative.

Using the explanation above, you can see how the answers were obtained. As for the last column, just use basic math to do this.

The atomic number of Phosphorus (P) is 15, so this means that there are 15 protons. Since it gained 3 electrons, just add 3 to 15:

15 + 3 = 18

Sr has an atomic number 38. Since it lost 2 electrons, just subtract 2 from the atomic number.

38-2 = 36

Fe has an atomic number 26. It lost 3 electrons, so we subtract again.

26-3 = 23

7 0
3 years ago
Which describes a homogeneous mixture?
Rom4ik [11]

Answer:

A solution dissolves in a solute to make a solvent.

Explanation:

The image is from Google

6 0
3 years ago
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