Alguien puede ayudarme? es muy urgente y estaría muy agradecido si me ayudan <3

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.

Amethod of separation that employs a system with two phases of matter, a mobile phase and a stationary phase, is called

Rank the compounds below from slowest to fastest rate of hydration. 1) formaldehyde 2) 3,3-dimethyibutan-2-one 3) propanal 4)3-methylbutan-2-one 5) butan-2-one