Question

Conservation of Mass Activity Worksheet (2.03)
Instructions: Observe and analyze the interactions between the substances pictured in the slide show. Compare the properties of substances before and after each interaction. You will submit your completed worksheet for grading.

Data Table

On the table below, record your observations before and after the interactions and explain how mass was conserved. Describe the changes in properties that prove a chemical reaction occurred. The first row is an example.


Observations Before Interaction Observations After Interaction How was mass conserved? Proof of a Chemical Reaction

Example: Sugar + Heat

Observations Before Interaction: The sugar is in tiny white particles in a pile. Heat is not seen but is implied by the heat source. The pile of sugar in the pot has a mass of 100 grams.

Observations After Interaction: There is a solid, light brown mass at the bottom of the pot. It has a mass of 100 grams.

How was mass conserved?: The mass of the sugar is the same in melted form as it is in solid crystal form.

Proof of a Chemical Reaction: There was not a chemical reaction. Sugar did not change composition. It only melted. Melting point is a physical property, and this is a physical change.


Substances added:

•Steel Wool + Oxygen (Fire)

•Egg + Heat

•Water + Heat

•Zinc + Hydrogen Chloride

•Sodium Hydroxide + Copper Sulfate

Answer 1

Answer:

Conservation of Mass Activity Worksheet Instructions: Observe and analyze the interactions between the substances pictured in the slide show. Compare the properties of substances before and after each interaction. You will submit your completed worksheet for grading. Data Table On the table below, record your observations before and after the interactions and note if mass was conserved. Describe the changes in properties that prove a chemical reaction occurred. The first row is an example. Observations Before Interaction Observations After InteractionWas Mass Conserved?Proof of a Chemical Reaction Example: Sugar + HeatThe sugar is in tiny white particles in a pile. Heat is not seen but is implied by the heat source. The pile of sugar in the pot weighs 100 grams.There is a solid, light brown mass at the bottom of the pot. It weighs 100 grams. Yes, both the reactants and the products weigh the same.There was not a chemical reaction. Sugar did not change composition. It only melted. Melting point is a

Explanation:

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Answer 2

There are various changes that occur before and after the interaction  is given a substance

• before interaction steel wool was there and after interaction with oxygen it burnt and gets converted into stem but before and interaction mass will be conserved
• the egg is a white-colored oval-shaped edible thing that contains a high amount of protein after interaction with heat it converts into protein clump together and solidifies into white and the yolk gets harden
• water is a colorless liquid after interaction with heat it gets warmed and some of it also convert into the steam of we heat water in a closed container then it mass will be conserved
• zinc is a metal and hydrochloride is a liquid acid after interaction it becomes zinc chloride and hydrogen gas will be released but mass is conserved here
• after interaction of sodium hydroxide and copper sulfate it gets converted into sodium sulfate and copper hydroxide

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