A solution of ammonia and water contains 4.20×1025 water molecules and 6.20×1024 ammonia molecules. how many total hydrogen atom
1 answer:
The molecular formula of water and ammonia is and
respectively.
From the atomic symbol of water it is clear that 1 mole of water contains 2 moles of hydrogen.
So, molecules of water contains
atoms of hydrogen.
From the atomic symbol of ammonia it is clear that 1 mole of ammonia contains 3 moles of hydrogen.
So, molecules of ammonia contains
atoms of hydrogen.
Total number of hydrogen atoms present in the solution = number of hydrogen atoms in water + number of hydrogen atoms in ammonia.
Substituting the values,
Total number of hydrogen atoms present in the solution =
Total number of hydrogen atoms present in the solution = .
Hence, the total number of hydrogen atoms present in the solution is atoms.
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Answer: polar protic solvents solvate the nucleophile necessary for attack on the substrate in SN2 substitution.
Explanation:
Aprotic solvents are solvents that lack protons such as dimethyl sulphoxide (DMSO). DMSO has no exposed positive end. The positive end is buried inside the molecular structure. As a result of this, the nucleophile is not solvated. If the nucleophile is solvated, the rate of SN2 reaction will reduce drastically because the nucleophile becomes unavailable to attack the substrate. This solvation normally occur in polar protic solvents such as water because of the exposed positive end of the molecule which interacts with the nucleophile thereby reducing the rate of SN2 reaction.
