Your teacher lights a small candle and allows it to burn. At first, the candle wax melts, but then it seems to burn away and disappear. The candle also gives off smoke, heat, and light. Is this a physical or a chemical change? Explain.

Answers

Answer 1

Burning of the candle is both physical and chemical change.burning of the candle causes the candle to melt the wax.so the wax has changed it was solid now it is liquid.the wax combines with the atmospheric oxygen and changes to carbon dioxide,heat and light.thus both the changes are accompanied by the burning of the candle.

Answer 2

A chemical change because the candle is burning and giving off heat. Once you burn a candle you can’t reverse it, which makes it a chemical change.

Related Questions

Explain how thinking about chemicals at the atomic and molecular scale can help to explain observable phenomena, such as the changes you see when you etch copper.

Answers

Answer:

Ask, “What should be done with the used copper chloride etching solution?”

Explanation:

and you should figure it out.

Answer:

copper chloride etching solution

Explanation:

I got you bro

what kind of substances and mixtures do you see around you? How do their properties determine what they used for?

Answers

Answer:

look around your property you'll find something!

Explanation:

how can you determine if the information you are reading is based on science or not?

Answers

Typically if based on science it will have scientific terms or be believable and backed up by facts

Clear scientific writing generally follows a specific format with key sections: an introduction to a particular topic, hypotheses to be tested, a description of methods, key results, and finally, a discussion that ties these results to our broader knowledge of the topic

Explain how thinking about chemicals at the atomic and molecular scale can help to explain observable phenomena, such as the changes you see when you etch copper.

Answers

Not a straight up answer, but moreover to help you get it: (Circuit Boards)

Aside from the tasks it performs, perhaps the most important function of a circuit board is providing a way to integrate the electronics for a device in a compact space. A PCB allows components to be correctly connected to a power source while being safely insulated. Also, circuit boards are less expensive than other options because they can be designed with digital design tools and manufactured in high volume using factory automation.

Partially straight up, helping you get the answer: (Copper Chloride)

Copper(II) chloride is the chemical compound with the chemical formula CuCl 2. This is a light brown solid, which slowly absorbs moisture to form a blue-green dihydrate.

Etching helps us to see the structure of the atoms of copper.

What is etching?

The term etching refers to the process by which we expose the inner structure of copper. It is usually done electrically or by the use of an acid. The surface of the copper is removed and the inner structure of the copper is shown.

As such, when you etch copper, you can see the inner structure such as the arrangement of the atoms of copper and how they fit together.

As such looking through the etched copper would help you to appreciate that matter is composed of atoms.

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What is the name given to this group of elements?

a.
halogens
c.
transition metals
b.
alkali metals
d.
noble gases

Answers

Answer: The answer is A. Halogens

Explanation:

I hope this helps you :)

The name given to this group is halogens

Which describes a light-year?(1 point)
Responses

total amount of light energy Earth receives in a year
total amount of light energy Earth receives in a year

the distance that light will travel in a year in a vacuum
the distance that light will travel in a year in a vacuum

a year on a low-gravity planet like Mercury
a year on a low-gravity planet like Mercury

the time it takes light to travel between the sun and Earth
the time it takes light to travel between the sun and Earth. this is science btw

Answers

Answer: the distance that light will travel in a year in a vacuum

Explanation:

the distance that light will travel in a year in a vacuum.

Please help again. Sorry!>♡

Answers

Matter is found every where in the universe and there is never any substance in the universe that is not composed of matter.

What is matter?

Matter is anything that has weight and occupy space. We know that matter is present in every part of the universe. Everything in the universe is composed of matter. Matter forms the basics of our study of the universe. Water, food cloths everything all are composed of matter.

The fact that matter inundates the universe has made the study of matter an unavoidable topic. As such, we can not really be able to point something that is of made up of matter. There can be no such thing!

As long as a thing does exist in the material universe, that thing is made up of matter. Look at yourself for example, matter is spread all across your body. The same occurs in the bodies of every other living thing.

The nonliving things are not also left out as they are equally composed of diverse kinds of matter that exists in the universe.

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Which main problem is being solved by the Hubble Space Telescope?(1 point)
Responses

identifying the brightest stars in the galaxy
identifying the brightest stars in the galaxy

burning of telescopes as they get closer to a star
burning of telescopes as they get closer to a star

cutting through a thick atmosphere to photograph stars
cutting through a thick atmosphere to photograph stars

bending of starlight by the atmosphere. this is science btw

Answers

Answer:

identifying the brightest stars in the galaxy

Explanation:

Identifying the brightest stars in the galaxy

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