Which of the following is an acid?

What is important to study for nios grade 12 chemistry? i have only one month left.

Which answer lists the fundamental forces in order from strongest to weakest

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this