What mass of phosphorus trichloride, PCl3, is produced when 69.2 g of P4 reacts with 243 g of Cl2 by the following reaction?

How to convert a density of 0.791g/cm3 to lb/ft3

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.