btw this is scince not chemistry i just couldent find it ^-^
Which term names the action that is happening when an acid eats away part of a metal bar?

A. neutralizing

B. corrosion

C. alkalizing

D. weathering

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

Answer explain why it is not possible to deduce a complete order of reactivity.

Which factor is likely to impact the possible number of compounds ?