Which of these best explains why the hydrogen atoms in a water molecule are attracted to Cl− ions in sodium chloride (NaCl)?
2 answers:
Answer: C. The hydrogen atoms have partial positive charges.
Explanation: The solubility of substances is governed by: Like dissolves like, which states that polar compounds are soluble in polar solvents and non polar compounds are soluble in non polar solvents.
Water being polar in nature dissolves by getting between the oppositely charged ions of solute and thus decreasing the forces of attraction between the ions. The positively charged
ions are attracted to positive pole of water which is hydrogen and the negatively charged
is attracted to negative pole of water which is oxygen.
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Answer:
6.67 moles
Explanation:
Given that:-
Moles of hydrogen gas produced = 10.0 moles
According the reaction shown below:-
3 moles of hydrogen gas are produced when 2 moles of aluminium undergoes reaction.
Also,
1 mole of hydrogen gas are produced when moles of aluminium undergoes reaction.
So,
10.0 moles of hydrogen gas are produced when moles of aluminium undergoes reaction.
<u>Moles of Al needed = moles = 6.67 moles</u>