Which type of star has the coolest surface temperatures?

A. neutron

B. red giant

C. white dwarf

D. main sequence

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

How many moles of al3+ ions are in 1.25 moles of al2o3

How many moles are in 43.9 l of oxygen