Balance BPO4 + Ca3N2 also what type of reaction is this?

Double displacement.

Explanation:

Hello!

In this case, according to the reactants, we need to keep in mind that boron has a charge of 3+, phosphate ion a charge of 3-, Calcium 2+ and nitride 3-. Thus, for the double displacement reaction that is analyzed, we obtain:

Which is balanced to:

Best regards!

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

: )