What do you want an answer to?
Answer:
D) hydrogen bonds
Explanation:
Hydrogen bonds are <em>intermolecular forces</em> — they are the forces of attraction between two different molecules.
For example, the partially positive H atom in HF is strongly attracted (H-bonded) to the partially positive F atom in a different HF molecule:
H-F···H-F.
All the other items are <em>intramolecula</em>r — they occur within a single molecule.
A) Electronegativity. <em>Wrong</em>. Arises between the two atoms that are bonded together in a single molecule<em>.
</em>
B) Double bonds. <em>Wrong</em>. Occur between two adjacent bonds in a single molecule, e.g., propene, CH₃CH=CH₂.
C) Covalent bonds. <em>Wrong</em>. Occur in a single molecule, e.g., methane, CH₄.
Solution,
Mass of Mg - 21gm
molar mass of Mg - 24gm
moles = Given mass/ Molar mass
moles = 21/24 = 0.875
1 mole of Mg produce 1 mole of H2 gas
so 0.875 mole of Mg will produce 0.875 moles of H2 gas
One mole of H2 gas = 22.4 litre
0.875 mole of H2 gas = 0.875×22.4
0.875 mole of H2 gas = 19.60 litre
So the nearest ANSWER is Option four 19.37 litre.
Huh I don’t know this
I’m doing this because u need more questions to ask lol
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