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Sagot :
According to the Law of Conservation of Mass, the total mass of the products and the total mass of the reactant in a chemical reaction are the same
The correct options are;
- 1. B.) It is a physical change because there is no reaction
- 2. A.) They form new substances
- 3. D.) 1
Reason:
1. Physical change is a change in which there is no change in the chemical properties of the substances involved
Therefore, the change is a physical change because there is no reaction
The correct option is option A.)
B.) It is a physical change because there is no reaction
2. A difference between a chemical change and a physical change is that a new substance is formed following chemical change while no new substance is formed in a physical change
Therefore, the correct option is option A.)
A.) They form new substances
3. The Law of Conservation of Mass states that mass can neither be created or destroyed in a closed system
Based on the Law of Conservation of Mass, the observation that contains an error is observation #1
[tex]\begin{array}{|c|c|c|}\mathbf{Observation} &\mathbf{Before \ Reaction}&\mathbf{During /After \ Reaction}\\&&\\1&Mass = 30 \ g&Mass = 42 \ g\end{array}[/tex]
From the given data, the mass of the items in the system change from 30 grams to 42 grams, which is an error based on Law of Conservation of Mass
The option that gives the observation that contains an error is option D.)
D.) 1
Learn more about the Law of Conservation of Mass, chemical and physical changes here:
https://brainly.com/question/14466325
https://brainly.com/question/18515296
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