Chem 1 Practice Test 1-1

Chem 1 Practice Test 1-1 - Practice Quiz 1 (This is not a...

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Practice Quiz 1 (This is not a comprehensive test! This is only a tool to help test some of the lecture material and help you evaluate your understanding of some key concepts in class.) 1. State the Law of Conservation of Matter and Energy. Law of Conservation of Matter: During an ordinary chemical change, there is no detectable increase or decrease in the quantity of matter. When a piece of copper metal is heated in air, it comes together with oxygen in the air. Then if it is weighed, it is found to have a greater mass that the original piece of metal. If however the mass of the oxygen of the air that combines with the metal is taken into consideration, it can be shown that the mass of the product is within the limits of accuracy of any weighing instrument, equal to the sum of the masses of the copper and oxygen that combine. This behavior of matter is in accord with what is called the The Law of Conservation of Energy states that energy cannot be created or destroyed, but can change its form. The total quantity of matter and energy available in the universe is a fixed amount and never any
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Chem 1 Practice Test 1-1 - Practice Quiz 1 (This is not a...

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