Determine the number of moles in 4.22x10^23 molecules of CaCL2

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

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

‘which reaction would most likely require the use of an inert electrode?