Question

Question

When hydrogen gas burns in the presence of oxygen, atoms are rearranged and a new substance is formed. Because a new substance is formed, which of these statements must BEST describe what happens?(1 point)
Responses

The properties of the new substance are different, so a physical change took place.
The properties of the new substance are different, so a physical change took place.

The properties of the new substance are the same, so a physical change took place.
The properties of the new substance are the same, so a physical change took place.

The properties of the new substance are different, so a chemical change took place.
The properties of the new substance are different, so a chemical change took place.

The properties of the new substance are the same, so a chemical change took place.
The properties of the new substance are the same, so a chemical change took place.

Answer 1

The best statement that describes what happens when hydrogen gas burns in the presence of oxygen is:

The properties of the new substance are different, so a chemical change took place.

This is because the burning of hydrogen in oxygen results in the formation of water, which has different properties than the original reactants (hydrogen and oxygen), indicating a chemical change has occurred.

Answer 2

Have you ever wondered why hydrogen peroxide is stored in dark brown containers? There's a really good reason for that. Hydrogen peroxide breaks down into water and oxygen gas. Many different things can cause this break-down reaction, classified as a decomposition reaction, to happen. For example, when hydrogen peroxide comes into contact with an enzyme in human blood, it breaks down into water and oxygen gas. That's why hydrogen peroxide bubbles if it comes into contact with blood. Exposure to light also causes this reaction to happen. In order to prevent the hydrogen peroxide from breaking down into water and oxygen gas in the bottle, sunlight has to be kept out of the bottle. To do that, the bottle needs to be a dark color.

Consider the hydrogen peroxide decomposition reaction represented by the space-fill models shown. Parts of the reaction are labeled in boxes under the parts of the equation. Drag the correct label to each box, Choices: Reactant(s), Physical change, Product(s), Ball and stick, Reaction occurs.

Answer 3

To organize the components of the hydrogen peroxide decomposition reaction using the labels provided, here is how you can match the labels:

1. Reactant(s): This label should be placed over the hydrogen peroxide (H₂O₂) in the reaction.
2. Ball and Stick: This label can be used for the representation of molecules, showing the molecular structure.
3. Reaction occurs: This label can be placed next to where the reaction takes place, indicating that the hydrogen peroxide is breaking down into its products.
4. Product(s): This label should be applied to the water (H₂O) and oxygen (O₂) that are formed as a result of the decomposition of hydrogen peroxide.
5. Physical change: This label typically refers to changes in state or form without a change in chemical composition. However, in this case, the decomposition of hydrogen peroxide is a chemical change since new substances (water and oxygen) are formed, so this label does not apply here.

Make sure to match each component based on the correct chemical concepts!

Answer 4

Can you put it in order with the question that i gave you?

Answer 5

Certainly! Here’s how you can categorize the components of the hydrogen peroxide decomposition reaction using the labels in the order you provided:

1. Reactant(s): Hydrogen peroxide (H₂O₂)
2. Ball and Stick: Representation of the molecular structure
3. Reaction occurs: Indicates the breaking down of hydrogen peroxide
4. Product(s): Water (H₂O) and Oxygen (O₂)
5. Physical change: This label does not apply here, as the decomposition is a chemical change.

So, the order from your original question with labels applied would look like this:

• Reactant(s) → Hydrogen peroxide (H₂O₂)
• Ball and Stick → Molecule representation
• Reaction occurs → Indication of the reaction
• Product(s) → Water (H₂O) and Oxygen (O₂)
• Physical change → Not applicable for this reaction

Let me know if you need further clarification or additional assistance!

Answer 6

can you just put Reactant(s), Product(s), and Physical change in order?

Answer 7

Certainly! Here’s the order with just the relevant labels:

1. Reactant(s): Hydrogen peroxide (H₂O₂)
2. Product(s): Water (H₂O) and Oxygen (O₂)
3. Physical change: (This label does not apply since decomposition of hydrogen peroxide is a chemical change, but if you still want it included, it would be here at the end.)

So, the order is:

1. Reactant(s)
2. Product(s)
3. Physical change

Please let me know if you need any further assistance!

Answer 8

you sure?

Answer 9

I apologize for any confusion in my previous response. To clarify, if we are categorizing the decomposition of hydrogen peroxide accurately based on the nature of the reaction, here is the correct order:

1. Reactant(s): Hydrogen peroxide (H₂O₂)
2. Product(s): Water (H₂O) and Oxygen (O₂)
3. Physical change: This label is not applicable, as the reaction is a chemical change (not a physical change) because new substances are formed.

If the question is strictly about what label to apply based on the reaction described, "Physical change" should not be included in this order because it's inaccurate.

If you really want just those three labels including "Physical change" despite it being incorrectly applied, then yes, the order remains as follows:

1. Reactant(s)
2. Product(s)
3. Physical change

But note that the decomposition of hydrogen peroxide is indeed a chemical change, not a physical change. Thank you for your patience!