Answer: 2LiBr(aq) + F2(g) —> 2LiF + Br2
explanation: Br and F are both nonmetals. Nonmetals should only replace other nonmetals in a single replacement reaction.
Ionic crystals are hard because of tight packing lattices, say, the positive and negative ions are strongly attached among themselves.
The mass number of the atom is 21, the atomic number is 9, and the element is Fluorine. There are 9 protons, 9 electrons, 12 neutrons, and the elemental symbol is F.
<h3>Properties of an atom</h3>
For every atom:
- Protons and neutrons are located in the nucleus and the addition of both equals the mass number of atoms.
- Electrons are located outside the nucleus, in orbitals.
- Neutral atoms have the same number of electrons and protons
In the diagram:
Number of electrons = 9
Number of protons = 9
Number of neutrons = 12
Mass number = 12 + 9
= 21
Atomic number = number of protons
= 9
Element with atomic number 9 = Fluorine
Symbol of the element = F
More on atoms can be found here: brainly.com/question/1566330
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Answer:
Chemical equation: NH₃(g) + O₂(g) → NO(g) + H₂O(l).
Oxidation reaction: N⁻³ → N⁺² + 5e⁻ /×4.
Reduction reaction: O₂⁰ + 4e⁻ → 2O⁻² /×5.
Oxidation reaction: 4N⁻³ → 4N⁺² + 20e⁻.
Reduction reaction: 5O₂⁰ + 20e⁻ → 10O⁻² /×5.
Balanced chemical equation: 4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(l).
Ammonia (NH₃) reacts with oxygen (O₂) and form nitrogen(II) oxide (NO) and water (H₂O). Catalyst is this reaction is platinum (Pt).
This is combustion reaction.
