Question

Boron, $B$ , forms an oxide. Which equation is correctly balanced?
A. $2B + 3{O_2} \to {B_2}{O_3}$
B. $2B + 3{O_2} \to 2{B_2}{O_3}$
C. $4B + 2{O_2} \to 2{B_2}{O_3}$
D. $4B + 3{O_2} \to 2{B_2}{O_3}$

Answer 1

Boron is a chemical element with atomic number $5$ and the symbol $B$ . It is a low-abundance element in the Solar System and the Earth's crust, produced entirely by cosmic ray spallation and supernovae rather than stellar nucleosynthesis. It makes up roughly $0.001\%$ of the Earth's crust by weight.

Complete answer:
Boron trioxide is formed when boron reacts with oxygen in the air $\left( {{\text{ }}{B_2}{O_3}} \right)$ . On the surface, boron trioxide creates a thin coating that blocks additional oxygen reactions.
The correct balancing of Boron when reacts with oxygen is: $4B + 3{O_2} \to 2{B_2}{O_3}$
So, the correct option is : (D) $4B + 3{O_2} \to 2{B_2}{O_3}$
Additional information:
Boric oxide is an effective high-temperature solvent for metallic oxides. It's used in the production of iron, nickel, and manganese alloys, as well as the creation of specialty welding and soldering fluxes. Amorphous metal and rare-earth magnets are also made from boric oxide.
Boron is used to create a variety of alloys. Two or more metals are melted and mixed to create an alloy. The properties of the mixture differ from those of the separate metals. Commercially, the most important of these alloys are used to create some of the world's strongest magnets. Boron, iron, and neodymium, for example, are used to make rare earth magnets. Microphones, magnetic switches, loudspeakers, headphones, particle accelerators, and a variety of other technical applications use these magnets.

Note:
The ability of boron to absorb neutrons is one of its most important properties. Neutrons are non-charged subatomic particles found in the nucleus of practically all atoms. Boron atoms have a high capacity for absorbing neutrons. As a result, boron is useful in nuclear reactor control rods.