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
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.
There is a solid, light brown mass at the bottom of the pot. It has a mass of 100 grams.
The mass of the sugar is the same in melted form as it is in solid crystal form.
There was not a chemical reaction. Sugar did not change the composition. It only melted. A melting point is a physical property, and this is a physical change.
Steel Wool + Oxygen (Fire)

Egg + Heat

Water + Heat

Zinc + Hydrogen Chloride

Sodium Hydroxide + Copper Sulfate

Question

16-08-2022
Computers and Technology

contestada

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
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.
There is a solid, light brown mass at the bottom of the pot. It has a mass of 100 grams.
The mass of the sugar is the same in melted form as it is in solid crystal form.
There was not a chemical reaction. Sugar did not change the composition. It only melted. A melting point is a physical property, and this is a physical change.
Steel Wool + Oxygen (Fire)

Egg + Heat

Water + Heat

Zinc + Hydrogen Chloride

Sodium Hydroxide + Copper Sulfate

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Lanuel Lanuel · Answer 1 · 2022-08-18T19:51:16+02:00

Steel Wool + Oxygen (Fire): Yes, the mass was conserved and a chemical change occurred.
Egg + Heat: Yes, the mass was conserved and a chemical change occurred.
Water + Heat: No, the mass wasn't conserved and a chemical change did not occur.
Zinc + Hydrogen Chloride: Yes, the mass was conserved and a chemical change occurred.
Sodium Hydroxide + Copper Sulfate: Yes, the mass was conserved and a chemical change occurred.

What is LOCOM?

LOCOM is an abbreviation for the law of conservation of mass and it states that mass is neither created nor destroyed in any chemical reaction. Hence, the mass of any substance in a balanced chemical equation would remain the same at the end.

According to the law of conservation of mass (LOCOM), the mass of all the reacting chemical elements of any substance (reactants) must be equal to the mass of the product formed during a chemical reaction.

Steel Wool + Oxygen (Fire).

Before interaction, we observed that the steel wool weighed 6 grams while oxygen weighed 1 gram. After interaction, we observed that there's a pile of brown particles (iron oxide) that weighed 7 grams.

Yes, the mass was conserved because the product weighs the same as both the reactants added together. Therefore, a chemical change occurred.

Egg + Heat.

Before interaction, we observed that the egg weighed 45 grams while heat weighed 0 gram. After interaction, we observed that there's a cooked egg that weighed 41 grams with its shell weighing 4 grams.

Yes, the mass was conserved because the product weighs the same as both the reactants added together. Therefore, a chemical change occurred.

Water + Heat.

Before interaction, we observed that the water weighed 5 grams while heat weighed 0 gram. After interaction, we observed that there's water vapor that weighed 5 grams with the molecular structure of water staying the same.

No, this is not a chemical change but a physical change because the water vapor can be transformed to water.

Zinc + Hydrogen Chloride.

Before interaction, we observed that zinc weighed 10 grams while hydrogen chloride weighed 5 gram. After interaction, we observed that there's a pile of white, odorless particles (zinc chloride) that weighed 12 grams and hydrogen gas weighing 3 grams.

Yes, the mass was conserved because the product weighs the same as both the reactants added together. Therefore, a chemical change occurred.

Sodium Hydroxide + Copper Sulfate.

Before interaction, we observed that sodium hydroxide weighed 50 grams while copper sulfate weighed 17 gram. After interaction, we observed that there's a pale blue precipitate of copper hydroxide that weighed 20 grams and sodium sulfate weighing 47 grams.

Yes, the mass was conserved because the product weighs the same as both the reactants added together. Therefore, a chemical change occurred.

Read more on chemical change here: https://brainly.com/question/9588031

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