Calculate the mass of oxygen required to react with iron to produce 240 g of iron (III) oxide. 4Fe + 3O2 —--> 2Fe2O3

An observation that requires measurement is called quantitative observable or qualitative

What occurs when a cell engulfs large food particals

Temperature is defined as a. the equivalent of heat. b. a measure of the average kinetic energy of the individual atoms or molecules composing a substance. c. how hot or cold it is. d. the total kinetic energy of the atoms or molecules composing a substance. e. none of the above is correct.