What’s the power of federal system an government

The federal system has the power to coin money, to regulate commerce, to declare war, to raise and maintain armed forces, and to establish a post office.

Federalism is a compromise meant to eliminate the disadvantages of both systems. In a federal system, power is shared by the national and state governments. The Constitution designates certain powers to be the domain of a central government, and others are specifically reserved to the state governments.