If the reaction uses 140 grams of iron, how much rust could be produced?

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted

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.

What are fossils of organisms that existed over a wide area but only for a limited time period called?