Help ASAP I’ll mark you as brainlister please help

Iron (3) oxide will decompose in the presence of hydrogen gas and heater to produced iron and digydrogen monoxide white a balanced chemical equation

The equation picture below shows which type of nuclear reaction u 235 + n x e 134 + sr 100 + 2n

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures