Arapid and continuous series of nuclear reactions is called a chain reaction. true or false?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Akno3 solution containing 51 g of kno3 per 100.0 g of water is cooled from 40 ∘c to 0 ∘c. what will happen during cooling?

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.