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)
b. Which of the following pieces of evidence helped Deanne and Bo answer question a? (2 points)
There is no information provided to answer this question.
a solid dissolved in a liquid (useful or not useful)
a new gas was formed useful or not useful
An odor changed useful or not useful
They saw a new color useful or not useful
Based on the information given in the question, the following piece of evidence would be useful for Deanne and Bo to answer question a:
- An odor changed
The fact that they no longer smelled the distinctive odor of vinegar after the reaction indicates that a chemical change occurred, and new compounds were formed.
There’s two answers !
Apologies for the confusion. Two pieces of evidence that would be useful for Deanne and Bo to answer question a are:
- An odor changed: The fact that they no longer smelled the distinctive odor of vinegar indicates that a chemical reaction took place.
- A new gas was formed: The formation of lots of bubbles during the reaction indicates the release of a gas, likely carbon dioxide, which is evidence of a chemical change.
Is liquid petroleum synthetic or natural material ?
Liquid petroleum, also known as crude oil, is a natural material. It is a fossil fuel that is formed from the remains of ancient marine organisms over millions of years.
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."
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.
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.
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 answers in total yes or not for each)
wonderful world of synthetic and the dangerous world of synthetic
Choices
Synthetic products are from natural resources
Synthetic products can be useful and even save lives
Synthetic products can be toxic for people and the planet
People should avoid using synthetic products whenever possible
The categorization of ideas according to the articles is as follows:
- Synthetic products are from natural resources: Both articles support this idea.
- Synthetic products can be useful and even save lives: The "Wonderful World of Synthetic Chemistry" article supports this idea.
- Synthetic products can be toxic for people and the planet: The "Dangerous World of Synthetic Chemistry" article supports this idea.
- People should avoid using synthetic products whenever possible: The "Dangerous World of Synthetic Chemistry" article supports this idea.
Okay so first one they both agree
Second one only the wonderful world agrees
3rd and 4th only the dangerous world agrees? Is that correct?