Which of the following are examples of physical properties an object might have? (multiple answers are possible)

Group of answer choices

brittle

blue

can burn

rectangular

can freeze

low luster

has low density

reacts with oxygen

boiling point of 400 K

smooth

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

Which compounds have the empirical formula ch2o? a. c2h4o2 b. c3h6o3 c. ch2o2 d. c5h10o5 e. c6h12o6

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion