2 years ago

Calculate the lattice energy for NaF (s) given the following

Chemistry

1 answer:

san4es73 [151]2 years ago

3 0

Answer: E

Explanation:

The lattice energy is the energy change when one mole of a crystal is formed from its components ions in its gaseous sate

Therefore lattice energy = heat of Sublimation+ ionization energy +electron affinity-(heat of formation)

Therefore lattice Energy = 109 +495 -328 +570.

Lattice energy = --923kjmol-1

You might be interested in

Which characteristic of the elements increases as you move across a period from left to right?

topjm [15]

Answer:

Valence electrons

Explanation:

In a period, the number of valence electrons increases (mostly for light metal/elements) as we move from left to right side

6 0

2 years ago

The molecular structure of water contains two atoms of hydrogen and one atom of oxygen . When water reaches its boiling point an

Arisa [49]

Molecules starts to get farther apart from each other. At boiling point the state of water changes to gas.

4 0

2 years ago

The two naturally occurring isotopes of antimony, 121Sb (57.21 percent) and 123Sb (42.79 percent), have masses of 120.904 and 12

Alex

Answer:

The correct answer is option c.

Explanation:

Formula used to determine an average atomic mass :

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$

Mass of isotope Sb-121 = 120.904 amu

Fractional abundance of Sb-121 = 57.21% = 0.5721

Mass of isotope Sb-123 = 122.904 amu

Fractional abundance of Sb-123 = 42.79% = 0.4279

Average atomic mass of Sb:

$120.904 amu\times 0.5721+ 122.904 amu\times 0.4279=121.7598 amu \approx 121.76 amu$

7 0

2 years ago

Stoichiometric coefficients indicate the ratio between ________of given substances in a chemical reaction

Cloud [144]

Answer:

Explanation:

7 0

3 years ago

I am giving brainly to the fastest

Svetllana [295]

North Dakota and Michigan because it has to be 32 Farenhieht or less to snow

6 0

2 years ago

Read 2 more answers