Hydrogen bonds:__________ a) form between two hydrogen atoms.
b) form only between hydrogen and oxygen atoms within a molecule.
c) form only between a weak electronegative atom and hydrogen.
d) involve a transfer of electrons.
e) form weak interactions but can provide structural stability when many are found in a single molecule.
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Answer:
Option e.
Explanation:
The option 'e' fact about Hydrogen bonds are correct, that is; ''form weak interactions but can provide structural stability when many are found in a single molecule''.
So, what is this Hydrogen bond?
Hydrogen bonds is a kind of strong dipole- dipole attractions. Hydrogen bonding occurs as a result of the bonding between hydrogen and strongly electronegative atoms for example oxygen, Fluorine and so on.
Since we now know what Hydrogen bond is, let us take a look at the options.
(a) for the first option, we can see from above meaning of Hydrogen bonds that Hydrogen bonds occur between Hydrogen and a strong Electronegative atom. So, this option is wrong.
(b). Option 'b' is also wrong Because Hydrogen bonds does not occur between hydrogen and oxygen atoms ONLY but also with other strong Electronegative atoms such as oxygen.
(c). Option 'c' is wrong because between a strong and not only between a weak electronegative atom and hydrogen.
(d). Option 'd' is also not correct.
(e). Option 'e' is correct. Hydrogen bonds contribute to the effect of boiling and melting point of substance, solubilty, dimerization, strength of bonds, shape of molecules and so on
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Atoms in a stay in a fixed position and have no freedom to move.
Answers
Answer:
1.7L of water.
Explanation:
Given parameters:
Volume of hydrogen gas = 1.7L
Unknown:
Volume of water produced = ?
Solution:
A synthesis reaction is one in which two compounds or molecules combines together to give a product or products.
Synthesis of water from hydrogen gas is represented by the equation below:
2H₂ + O₂ → 2H₂O
We clearly see that;
2 mole of hydrogen gas gives 2 mole of water as the product;
From Gay-lussac's law of combining volume "when gases react, they do so in volumes which bear a simple ratio to one another and to the volume of the product if gaseous, temperature and pressure remaining constant".
2H₂ + O₂ → 2H₂O
2 volumes of hydrogen gas will produce 2 volumes of water
1.7L of hydrogen gas will also produce ; 1.7L of water.
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Answer: The volume of calcium is 100 ml.
Explanation:
Density is defined as the mass contained per unit volume.
Given : Mass of calcium= 50.0 grams
Density of calcium =
Putting in the values we get:
Thus the volume of calcium is 100 ml.
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b. nucleotide.
c. peptide.
d. monomer.
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