Hydrogen peroxide undergoes a decomposition reaction to form water and oxygen gas.
a. The boiling point of water is 100o
C. The boiling point of hydrogen peroxide is about 150o
C. Does this make sense? Why or why not.
(1 point)
Responses
No, it doesn't make sense, because we expect products and reactants to have different properties.
No, it doesn't make sense, because we expect products and reactants to have different properties.
No, it doesn't make sense, because a physical change took place.
No, it doesn't make sense, because a physical change took place.
Yes, it makes sense, because a physical change took place.
Yes, it makes sense, because a physical change took place.
Yes, it makes sense, because we expect products and reactants to have different properties.
Yes, it makes sense, because we expect products and reactants to have different properties.
Question 2
b. How would you expect the density of water to compare to the density of hydrogen peroxide?(1 point)
Responses
The density of water would be the same as the density of hydrogen peroxide.
The density of water would be the same as the density of hydrogen peroxide.
The density of water would be different from the density of hydrogen peroxide.
The density of water would be different from the density of hydrogen peroxide.
It is impossible to tell if the densities would be the same or different.
The density of water would be different from the density of hydrogen peroxide.
Hydrogen peroxide undergoes a decomposition reaction to form water and oxygen gas.
a. The boiling point of water is 100o
C. The boiling point of hydrogen peroxide is about 150o
C. Does this make sense? Why or why not.
(1 point)
Responses
No, it doesn't make sense, because we expect products and reactants to have different properties.
No, it doesn't make sense, because we expect products and reactants to have different properties.
No, it doesn't make sense, because a physical change took place.
No, it doesn't make sense, because a physical change took place.
Yes, it makes sense, because a physical change took place.
Yes, it makes sense, because a physical change took place.
Yes, it makes sense, because we expect products and reactants to have different properties.
Yes, it makes sense, because we expect products and reactants to have different properties.
Yes, it makes sense, because we expect products and reactants to have different properties.
thx
You're welcome! If you have any more questions, feel free to ask.
Aria and Marcus know that when sugar burns, it undergoes this reaction. However, they are not sure how much water is produced. Their teacher encourages them to think about the law of conservation of matter.
C6
H12
O6
+ 6O2
→ 6CO2
+ some amount of H2
O
a. There are 12 atoms of hydrogen shown on the reactant side. How many total atoms of hydrogen must be on the product side?
(1 point)
Responses
2
2
6
6
12
12
18
In the reaction, there are 12 atoms of hydrogen shown on the reactant side. According to the law of conservation of matter, the number of atoms of an element must be the same on both sides of the reaction. Therefore, there must be 12 atoms of hydrogen on the product side as well.
The correct answer is 12.
b. What does the law of conservation of matter (or the law of conservation of mass) tell the students?(1 point)
Responses
Matter is always gained or lost in a chemical or physical process.
Matter is always gained or lost in a chemical or physical process.
Matter is never gained or lost in a chemical or physical process.
Matter is never gained or lost in a chemical or physical process.
Matter might be lost in a chemical or physical process.
Matter might be lost in a chemical or physical process.
Matter might be gained in a chemical or physical process.
The correct answer is: Matter is never gained or lost in a chemical or physical process.
c. Aria and Marcus combine 180 grams of sugar with 192 grams of oxygen gas. What would they expect the total mass of the products to be? Why?
You can use the calculator (below the answers) if desired.
(1 point)
Responses
The total mass of the products would be 372 grams, because mass cannot be gained or lost in the process.
The total mass of the products would be 372 grams, because mass cannot be gained or lost in the process.
The total mass of the products would be greater than 372 grams, because water is really heavy.
The total mass of the products would be greater than 372 grams, because water is really heavy.
The total mass of the products would be something less than 372 grams, because some of the mass burned into nothing.
The total mass of the products would be something less than 372 grams, because some of the mass burned into nothing.
The total mass of the products would equal 180 grams, because the mass of oxygen gas doesn't make a difference.
The total mass of the products would equal 180 grams, because the mass of oxygen gas doesn't make a difference.
The correct answer is: The total mass of the products would be 372 grams, because mass cannot be gained or lost in the process.
Adi and Emeril were discussing articles they had read online. They summarized the articles and then talked about what the articles meant.
Adi read an article entitled, "The Wonderful World of Synthetic Chemistry." Emeril read an article entitled, "The Dangerous World of Synthetic Chemistry."
Read the portions of the articles (below) that Adi and Emeril had read. Then answer the questions.
The Wonderful World of Synthetic Chemistry
Synthetic chemistry involves producing new substances from existing raw materials. Often, the raw materials come from petroleum products like oil and natural gas, which have to be removed from deep underground. Then those molecules are used as starting materials to form new, useful molecules for things like plastics and medicines. Synthetic chemicals can be applied to clothing and household goods to make them resistant to burning. Synthetic clothing can be produced inexpensively and in a wide variety of styles. Plastic containers are lightweight and easy to transport.
The Dangerous World of Synthetic Chemistry
Synthetic materials are produced when raw materials undergo chemical reactions. Synthetic chemistry involves drilling for oil or liquid petroleum to use as raw materials. This process can lead to environmental pollution and risks to human health. Synthetic plastics are "forever" items, meaning it can take them hundreds or even thousands of years to break down in the environment. Recycling programs are not reliable, and single-use synthetic products are wasteful. Some synthetic chemicals are poisonous and can seep into groundwater.
Question 1
Adi and Emeril wanted to categorize their ideas about synthetic chemicals. Help them sort the ideas according to the articles that would support those ideas.
a. Click to show which ideas match which articles.
Some ideas might be found in both articles, so you may need to click to show that one or more ideas could be supported by both articles. (In other words, you might click twice on the same row.)
(4 points)
The Wonderful World of Synthetic Chemistry The Dangerous World of Synthetic Chemistry
Synthetic products are made from natural resources.
The Wonderful World of Synthetic Chemistry – Synthetic products are made from natural resources.
The Dangerous World of Synthetic Chemistry – Synthetic products are made from natural resources.
Synthetic products can be useful and can even save lives.
The Wonderful World of Synthetic Chemistry – Synthetic products can be useful and can even save lives.
The Dangerous World of Synthetic Chemistry – Synthetic products can be useful and can even save lives.
Synthetic products can be toxic for people and the planet.
The Wonderful World of Synthetic Chemistry – Synthetic products can be toxic for people and the planet.
The Dangerous World of Synthetic Chemistry – Synthetic products can be toxic for people and the planet.
People should avoid using synthetic products whenever possible.
The Wonderful World of Synthetic Chemistry – People should avoid using synthetic products whenever possible.
The Dangerous World of Synthetic Chemistry – People should avoid using synthetic products whenever possible.
Question 2
b. How do you expect synthetic materials to compare to the natural resources used to make them?
(1 point)
Responses
The synthetic materials have the same properties as the raw materials because chemical reactions took place.
The synthetic materials have the same properties as the raw materials because chemical reactions took place.
The synthetic materials have different properties from the raw materials because chemical reactions took place.
The synthetic materials have different properties from the raw materials because chemical reactions took place.
The synthetic materials have the same properties as the raw materials because chemical reactions did not take place.
The synthetic materials have the same properties as the raw materials because chemical reactions did not take place.
The synthetic materials have different properties from the raw materials because chemical reactions did not take place.
The correct answer is: The synthetic materials have different properties from the raw materials because chemical reactions took place.
Adi and Emeril wanted to categorize their ideas about synthetic chemicals. Help them sort the ideas according to the articles that would support those ideas.
a. Click to show which ideas match which articles.
Some ideas might be found in both articles, so you may need to click to show that one or more ideas could be supported by both articles. (In other words, you might click twice on the same row.)
(4 points)
The Wonderful World of Synthetic Chemistry The Dangerous World of Synthetic Chemistry
Synthetic products are made from natural resources.
The Wonderful World of Synthetic Chemistry – Synthetic products are made from natural resources.
The Dangerous World of Synthetic Chemistry – Synthetic products are made from natural resources.
Synthetic products can be useful and can even save lives.
The Wonderful World of Synthetic Chemistry – Synthetic products can be useful and can even save lives.
The Dangerous World of Synthetic Chemistry – Synthetic products can be useful and can even save lives.
Synthetic products can be toxic for people and the planet.
The Wonderful World of Synthetic Chemistry – Synthetic products can be toxic for people and the planet.
The Dangerous World of Synthetic Chemistry – Synthetic products can be toxic for people and the planet.
People should avoid using synthetic products whenever possible.
The Wonderful World of Synthetic Chemistry – People should avoid using synthetic products whenever possible.
The Wonderful World of Synthetic Chemistry - Synthetic products are made from natural resources, Synthetic products can be useful and can even save lives, People should avoid using synthetic products whenever possible.
The Dangerous World of Synthetic Chemistry - Synthetic products are made from natural resources, Synthetic products can be toxic for people and the planet.
and the 2 others are The Dangerous World of Synthetic Chemistry
My apologies for missing that. The other two ideas belong to The Dangerous World of Synthetic Chemistry: Synthetic products are made from natural resources and Synthetic products can be toxic for people and the planet.
c. Drag and drop each item into the correct column in order to sort the synthetic materials vs. the natural materials.
(2 points)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
synthetic materials natural materials
Unfortunately, as a text-based AI, I am unable to perform drag-and-drop actions or interact with inputs directly. However, I can provide you with the correct sorting:
Synthetic materials:
- Plastics
- Synthetic clothing
- Synthetic chemicals
Natural materials:
- Oil and natural gas
- Raw materials
Please place the items in the correct column based on the information provided.