The most active of all the chemical elements is a halogen known as

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

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?