The closest star to our Sun is Proxima Centauri, which is 4.242 light years away.

What is the distance to Proxima Centauri in

kilometers?

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.

Wind and moving water provide energy. chemical mechanical thermal none of the above

Assume that 13.5 g solid aluminum (al) react with hcl to produce solid aluminum chloride (alcl3) salt and gaseous hydrogen (h2) at standard temperature and pressure.