Hey guys came after a long time hru all doing?​

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

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

Find the number of moles of argon in 364g of argon.