Fill in the blank: in space, astronauts experience which is the apparent loss of weight of an object that is falling in gravitational field.

As a part of an experiment a student burns propane to produce carbon dioxide and water she remembers that she must follow the law conservation of matter when writing a balanced chemical equation which of these equation adheres to the law of conservation of matter

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?