4 Please answer the following question according to the Law of Conservation of Matter: Sam mixes 40 grams of backing soda with 20 grams of vinegar to produce a chemical change. After the chemical reaction happens, Sam is left with a clear liquid that has a mass of 50 grams and a gas that has a mass of
_.

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.