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klio [65]
3 years ago
11

9. A student needs to prepare 100 mL of a 0.50 M ammonium chloride, NH4Cl,

Chemistry
1 answer:
ahrayia [7]3 years ago
6 0

Answer:

2.67g of NH4Cl are required

Explanation:

Molarity is an unit of concentration in chemistry defined as the moles of solute (In this case, NH4Cl), per liter of solution.

To prepare 100mL of a 0.50M are required:

100mL = 0.100L * (0.50 moles / L) = 0.0500 moles NH4Cl

As molar mass of NH4Cl is 53.491g/mol:

0.0500 moles * (53.491g / mol) =

<h3>2.67g of NH4Cl are required</h3>
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What is the lowest unoccupied molecular orbital in F2?
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Answer:

σ*2pₓ, also called 3\sigma_{u}\text{*}

Explanation:

I have drawn the MO diagram for fluorine below.

Each F atom contributes seven valence electrons, so we fill the MOs of fluorine with 14 electrons.

We have filled the \pi \text{*2p}_{y} and \pi \text{*2p}_{z} MOs.

They are the highest occupied molecular orbitals (HOMOs).

The next unfilled level (the LUMO) is the σ*2pₓ orbital. If you use the symmetry notation, it is called the 3\sigma_{u}\text{*} orbital.

This is the orbital that fluorine uses when it acts as an electron acceptor.

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3 years ago
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Answer:

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8 0
2 years ago
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Answer:

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Answer:

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