How much water has to be evacuated from 250ml of 1M Ca(OH)2 to make it 3M​

Type the letter that represents the correct location for each particle type below.

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 of the following units is not an official si unit? mole liter kilogram ampere