.Are the following equations balanced or unbalanced? P4 + 3Br2 → 2PBr3

AlBr3 + 3K 3KBr + Al

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

Infrared radiation has wavelengths that are shorter than visible light is part of the visible light spectrum has wavelengths that are longer than visible light has the same wavelengths as ultraviolet radiation

The substances that are necessary for producing of certain hormones and that store and transport vitamins