Make a yard of difference and enjoy outdoor Make a yard of difference and enjoy outdoor living with the new Flowtron Mosquito PowerTrap. Four set-and-forget computerized modes operate the unit automatically when mosquitoes are most active. The Mosquito PowerTrap mimics the breath, scent and body heat of humans to effectively attract mosquitoes, black flies, midges and other biting ...
The law of conservation of mass (sometimes referred to as the principle of mass conservation) is as follows: for any system closed to all transfers of matter and energy (both of which have mass), the mass of the system must remain constant over time, as system mass cannot change quantity if it is not added or removed.
The Law of Conservation of Mass. The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system.