Deanne and Bo conduct an experiment at school. They put vinegar into a dish, and then they add baking soda to it. Lots of bubbles form as they stir the two substances together. After the bubbling stops, they notice that they no longer smell the distinctive odor of vinegar. Their teacher explains that the atoms making the vinegar and the atoms making the baking soda were recombined to form water, carbon dioxide, and another compound called sodium acetate.(2 points)
a. Deanne and Bo determine that a reaction
did
take place. When a reaction takes place, atoms must
rearrange to form new substance
.
Question 2
b. Which of the following pieces of evidence helped Deanne and Bo answer question a?(2 points)
evidence that was useful to Deanne and Bo evidence that was not observed or was not useful
A solid dissolved in a liquid.
evidence that was useful to Deanne and Bo – A solid dissolved in a liquid.
evidence that was not observed or was not useful – A solid dissolved in a liquid.
A new gas was formed.
evidence that was useful to Deanne and Bo – A new gas was formed.
evidence that was not observed or was not useful – A new gas was formed.
An odor changed.
evidence that was useful to Deanne and Bo – An odor changed.
evidence that was not observed or was not useful – An odor changed.
They saw a new color.
evidence that was useful to Deanne and Bo – They saw a new color.
evidence that was not observed or was not useful – They saw a new color.
Is Nylon shorts synthetic materials or natural materials
evidence that was useful to Deanne and Bo – A new gas was formed.
evidence that was useful to Deanne and Bo – An odor changed.
what about was not helpful
evidence that was not observed or was not useful – A solid dissolved in a liquid.
evidence that was not observed or was not useful – They saw a new color.
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
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.
No, it doesn't make sense, because a physical change took place.
No, it doesn't make sense, because a physical change took place.
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.
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.
Yes, it makes sense, because we expect products and reactants to have different properties.
The density of water would be different from the density of hydrogen peroxide.
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
18
Question 2
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.
Matter might be gained in a chemical or physical process.
Question 3
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 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 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 372 grams because mass cannot be gained or lost in the process.
what about a
There are 12 atoms of hydrogen shown on the reactant side. The total atoms of hydrogen must also be 12 on the product side.
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
6
12
18
Question 2
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 never gained or 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.
Question 3
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 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 equal 180 grams, because the mass of oxygen gas doesn't make a difference.
The total mass of the products would be 372 grams, because mass cannot be gained or lost in the process.
a. The total atoms of hydrogen must be 12 on the product side.
b. The law of conservation of matter (or the law of conservation of mass) tells the students that matter is never gained or lost in a chemical or physical process.
c. Aria and Marcus would expect the total mass of the products to 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 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 different properties from 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 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 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.
Question 3
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
Question 1:
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 can be toxic for people and the planet.
Question 2:
The synthetic materials have different properties from the raw materials because chemical reactions took place.
Question 3:
Synthetic materials: synthetic plastics, synthetic clothing, plastic containers
Natural materials: raw materials, oil, liquid petroleum
Is sunscreen spray synthetic materials or natural materials
Sunscreen spray typically contains both synthetic and natural materials. The active ingredients in sunscreen, such as avobenzone and octinoxate, are often synthetic chemicals developed specifically for sun protection. However, sunscreen can also contain natural ingredients like plant extracts or minerals (e.g. zinc oxide or titanium dioxide) that provide additional sun-blocking properties.
Is water synthetic materials or natural materials
Water is considered a natural material. It is a compound made up of two hydrogen atoms bonded to one oxygen atom and is abundant in nature. While there are methods to purify or treat water for various purposes, the fundamental chemical composition of water remains unchanged.
Nylon shorts are synthetic materials. Nylon is a synthetic polymer that is derived from petrochemicals. It is a man-made material that is created through chemical processes, rather than being naturally occurring.
Is plastic bottle synthetic materials or natural materials
A plastic bottle is a synthetic material. Plastic is typically made from petroleum or natural gas through a process called polymerization. It is a synthetic polymer that is manufactured and does not occur naturally.
Is cotton plant synthetic materials or natural materials
Cotton is a natural material. It is derived from the cotton plant, specifically the fibers that surround the seeds of the plant. Cotton is a natural fiber and is widely used in the textile industry for various applications, including clothing and bedding.
Is oak tree synthetic materials or natural materials
An oak tree is a natural material. It is a living organism that belongs to the plant kingdom. Oak trees are known for their strong and durable wood, which is a natural material that can be used for various purposes, such as furniture, flooring, and construction.
Is latex paint synthetic materials or natural materials
Latex paint is a synthetic material. Despite its name, latex paint does not actually contain natural latex from rubber trees. It is an emulsion of synthetic polymers derived from petrochemicals, such as styrene and butadiene. These synthetic polymers provide the binding and adhesive properties that allow paint to adhere to surfaces and create a durable and protective coating.
In the video, 1 gram of ammonium chloride is added to 5 mL of water. The following reaction takes place.
NH4
Cl + H2
O → NH4
OH + HCl
starting temperature ending temperature
20o
C 14o
C
Fill in the blanks to complete the following description.
(6 points)
In this reaction, the temperature changed from
to
. This means the temperature
. This type of reaction is categorized as
. This type of reaction causes the surrounding to feel
, which is why it is a good reaction to use when designing a
.