Why law of conservation of mass should better be called as law of conservation of mass and energy

Energy can neither be created not be destroyed

Mass too can neither be created nor be destroyed

Both of them remain conserved during any chemical or physical reaction

Some part of them gets transformed to undesired useless form

Hence law of conservation of mass should better be called the law of conservation of mass and energy

I hope helps you and if you consider and want you can give me a crown