The mass of the substance in a chemical reaction
.Changes of substance in any reaction must be to determine the extent to which education is an important element in section 2 is the best that is within the scope of the study, both before and after the change on the called System. Such containers. The equipment or measuring tool called environment, such as water, icy. The system before changing the system and after the change on the ice. Best environmental management system is certified with the following systems: 2
.1. turn off system is a system that does not have a mass transfer of substances between the system and environment.
2. open system, is a system that has a mass transfer of substances between the system and environment
.Study on the change of the substance need to specify various properties of a system, such as mass, volume, temperature, pressure, if you verify any properties of the system is changed, it can be considered a change occurs in the system. System State
In 2317 (1774) on ngotwon-la raging lorong SI El. Try burning the substance in a sealed tube, found that the total mass of the substance before the reaction is equal to the total mass of the substance after the reaction, so as a rule, called rule of mass
.Chef Joe has studied rat page, in preparation for some compounds found that one of the compounds that are prepared in different ways with the ratio by mass of the elements that together as a compound, there is a constant, so as a rule called. For example, the substance of copper (II) sulfide (CuS) that is caused by a combination of copper and sulfur by mass ratio is equal to 2:1.
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