Unit B Section 4.2
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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Is the total mass of these products is always the same as the total mass of the reactants.
yes
What is the conservation of mass?
It states that matter is not created or destroyed in a chemical reaction. For example, combining 24.3 g of magnesium and 32.1 g of sulfur creates a new substance called magnesium sulfide. The law of conservation of mass predicts that the mass of the product will be the sum of these two masses: 56.4 g.
What is a closed system
closed systems, where no additional material is allowed to enter or leave Ex. Biosphere
What is an open system?
Where substances can easily enter and leave. Ex.adding 10 g of Alka-Seltzer to 100 g of water in a beaker causes carbon dioxide gas to be given off. The outcome is 106 grams instead of 110 grams
Which system are careful experiments mostly done
closed systems
In a nuclear reaction, some of the mass is converted to energy
Yeas