Boric acid solution is used as eyes wash. What mass of boric acid is present in 250.0grams of solution that is 2.25%m/m acid in water?

Schrodinger and heisenberg developed an alternate theory about atomic nature that contradicted some of bohr's model of the atom. how do changes resulting from new technology and evidence affect the reputation of the atomic theory?

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?

What is a number added in front of a formula in order to balance the equation