Acoal-burning power plant produces 500 megawatts of electricity while burning 225,000 kg of coal per hour (almost 250 tons each if the coal has an average energy content of 20 million joules per kg, determine the efficiency of the power plant.

40%

Explanation:

The efficiency of a plant is determined by

Our produced energy is

While the input energy can be calculated

So, the efficiency of plant is

or 40% efficient

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.