Chemistry: Which of these is an example of a chemical change?

No answer choices but Chemical changes are changes in which can t be undone an example would be a rotting...

Which of these is an example of a chemical change?, №17886662, 27.01.2020 20:42

Biology

1.changes to a substance that do not involve a permanent reordering of atoms are know as physical changes. endothermic changes. irreversible changes. chemical changes. 2.changes that reorder atoms to form new molecules, such as the reaction between sodium and chlorine ions to form sodium chloride, are known as irreversible changes. boiling point changes. chemical changes. physical changes. 3.what does the release or absorption of energy indicate? chemical change neither physical nor chemical changes physical change physical and chemical changes

Step-by-step answer

P Answered by Master

14

The explanations are mentionned in the attached file.

1. The right answer is physical changes.

2. The right answer is chemical changes.

3. The right answer is chemical change.

4. The right answer is fireworks exploding.

5. The right answer is All of the above.

6. The right answer is combining oxygen gas and hydrogen gas to form liquid water.

7. The right answer is gas is produced.

8. The right answer is The compound may or may not be poisonous, depending on the chemical properties of the new substance.

9. The right answer is This is a physical change, because the two substances were separated physically by boiling.

10. The right answer is C. The tablet that was placed in the water interacted ... chemical change.

11. The right answer is B. Energy is either released or absorbed.

12. The right answer is that we should compare both physical and chemical properties of these two substances : if they have the same properties, it means that it is the same substance, if not, they are different substances.

13. The right answer is A. Flammability.

14. The right answer is Column.

15. The right answers are Melting point, conductivity, solubility, malleability, density.

16. The right answer is oxidation, flammability, combustibility.

17. The right answer is A. Arrangement of protons in the nucleus.

Biology

1.changes to a substance that do not involve a permanent reordering of atoms are know as physical changes. endothermic changes. irreversible changes. chemical changes. 2.changes that reorder atoms to form new molecules, such as the reaction between sodium and chlorine ions to form sodium chloride, are known as irreversible changes. boiling point changes. chemical changes. physical changes. 3.what does the release or absorption of energy indicate? chemical change neither physical nor chemical changes physical change physical and chemical changes

Step-by-step answer

P Answered by Master

14

The explanations are mentionned in the attached file.

1. The right answer is physical changes.

2. The right answer is chemical changes.

3. The right answer is chemical change.

4. The right answer is fireworks exploding.

5. The right answer is All of the above.

6. The right answer is combining oxygen gas and hydrogen gas to form liquid water.

7. The right answer is gas is produced.

8. The right answer is The compound may or may not be poisonous, depending on the chemical properties of the new substance.

9. The right answer is This is a physical change, because the two substances were separated physically by boiling.

10. The right answer is C. The tablet that was placed in the water interacted ... chemical change.

11. The right answer is B. Energy is either released or absorbed.

12. The right answer is that we should compare both physical and chemical properties of these two substances : if they have the same properties, it means that it is the same substance, if not, they are different substances.

13. The right answer is A. Flammability.

14. The right answer is Column.

15. The right answers are Melting point, conductivity, solubility, malleability, density.

16. The right answer is oxidation, flammability, combustibility.

17. The right answer is A. Arrangement of protons in the nucleus.

Physics

Alan wrote the following examples of changes in substance. example a: a camp fire is lighted. example b: plants convert carbon dioxide and water into qlucose and oxygen. which statement is correct? a. both are examples of physical change. b. both are examples of chemical change. c. example a describes physical change and example b describes chemical change. d. example a. describes a chemical change and example b describes a physical change.

Step-by-step answer

P Answered by Specialist

14

A campfire being lighted and plants converting carbon-dioxide and water into glucose and oxygen are both forms of chemical change.

Therefore, the answer is:

B. Both are examples of chemical change.

Physics

Alan wrote the following examples of changes in substance. example a: a camp fire is lighted. example b: plants convert carbon dioxide and water into qlucose and oxygen. which statement is correct? a. both are examples of physical change. b. both are examples of chemical change. c. example a describes physical change and example b describes chemical change. d. example a. describes a chemical change and example b describes a physical change.

Step-by-step answer

P Answered by Master

14

A campfire being lighted and plants converting carbon-dioxide and water into glucose and oxygen are both forms of chemical change.

Therefore, the answer is:

B. Both are examples of chemical change.

Chemistry

Why are some examples of a chemical reaction not actually foolproof evidence that of a chemical reaction? 13, 8th grade, and i m doing my science lab report: the lab was a chemistry lab. we got a bunch of toxic chemicals and put pairs of them together, recorded the reactions, and wrote balanced equations for each of them and identified what kind of reaction they were. the whole name of the lab is evidence of chemical reactions , and one of the first analysis questions is write a paragraph about the kinds of changes you would expect to see if a

Step-by-step answer

P Answered by PhD

2

So basically, the change in color effects the amount of cations in the solution making it a physical change rather than a chemical one, defying the law of conservation of mass! I hope this helped! (The only time the change in color affects the amount of cations is in the Alkaline Earth Metals)

source: college science teacher

Chemistry

Why are some examples of a chemical reaction not actually foolproof evidence that of a chemical reaction? 13, 8th grade, and i m doing my science lab report: the lab was a chemistry lab. we got a bunch of toxic chemicals and put pairs of them together, recorded the reactions, and wrote balanced equations for each of them and identified what kind of reaction they were. the whole name of the lab is evidence of chemical reactions , and one of the first analysis questions is write a paragraph about the kinds of changes you would expect to see if a

Step-by-step answer

P Answered by PhD

2

So basically, the change in color effects the amount of cations in the solution making it a physical change rather than a chemical one, defying the law of conservation of mass! I hope this helped! (The only time the change in color affects the amount of cations is in the Alkaline Earth Metals)

source: college science teacher

Biology

Temperature can weather rocks because most rocks do not absorb heat evenly water contracts when it freezes heat can cause minerals to oxidize rocks usually melt in the hot sun when wet rocks dry out, they can crack and break. this process, called slaking, is an example of what? chemical weathering physical weathering water erosion wind erosion in which of the following locations would chemical weathering happen most quickly? amazon rainforest sahara desert north pole great plains which of the following is an example of chemical weathering? a river

Step-by-step answer

P Answered by Master

37

Rocks can oxidize in heat and the minerals can cause the rock to crack and break off .

slaking is physical weathering because the rock is still the same, but its wet.

chemical weathering would happen the most quickly in the amazon rainforest.

chemicals in water dissolving minerals in rock is chemical weathering.

erosion removes fertile topsoil, is caused mainly by wind and water, and can decrease revenue from agriculture.

erosion can be reduced by planting trees and contour plowing.

runoff happens when the ground cannot absorb anymore water is a true statement.

Chemistry

How would you classify the following events? event 1: water boils at 100 degrees celsius event 2: a nail rusts when left outdoors event 1 is an example of a chemical change and event 2 is an example of a physical change. event 1 is an example of a chemical change and event 2 is an example of a chemical change. event 1 is an example of a physical change and event 2 is an example of a chemical change. event 1 is an example of a physical change and event 2 is an example of a physical change.

Step-by-step answer

P Answered by PhD

6

Event 1 is an example of a physical change and Event 2 is an example of a chemical change.

Explanation: Physical change is one in which there is no change in chemical composition of the substance. There is only a change in phase change.

Chemical change is a change in which there is a change in chemical composition and there might or might not be a phase change.

On Boiling, the water molecules remain bonded in the same form and only covert from liquid to gaseous form, thus is a physical change.

On Rusting of iron nail, the iron changes to iron oxide by combining with oxygen, there is a rearrangement of atoms and thus is a chemical change.

$Fe+O_2+H_2O\rightarrow Fe_2O_3.xH_2O$

Biology

Temperature can weather rocks because most rocks do not absorb heat evenly water contracts when it freezes heat can cause minerals to oxidize rocks usually melt in the hot sun when wet rocks dry out, they can crack and break. this process, called slaking, is an example of what? chemical weathering physical weathering water erosion wind erosion in which of the following locations would chemical weathering happen most quickly? amazon rainforest sahara desert north pole great plains which of the following is an example of chemical weathering? a river

Step-by-step answer

P Answered by Specialist

37

Rocks can oxidize in heat and the minerals can cause the rock to crack and break off .

slaking is physical weathering because the rock is still the same, but its wet.

chemical weathering would happen the most quickly in the amazon rainforest.

chemicals in water dissolving minerals in rock is chemical weathering.

erosion removes fertile topsoil, is caused mainly by wind and water, and can decrease revenue from agriculture.

erosion can be reduced by planting trees and contour plowing.

runoff happens when the ground cannot absorb anymore water is a true statement.

Social Studies

1: which of these is a chemical property of a substancereactivitycolor boiling pointmelting point2: what does the release or absorption of energy indicate physical change chemical changephysical and chemical changesneither physical nor chemical changes3: which of these is an example of a physical changebreaking bread baking bread digesting breadtoasting bread 4: which of these is an example of a chemical change cutting breadspreading peanut butterdigesting a sandwich stirring jelly5: which of these is an example of a chemical change fireworks exploding

Step-by-step answer

P Answered by Specialist

22

1:Reactivity
2:Physical and Chemical Changes
3:Breaking Bread
4:Digesting a Sandwich
5:Fireworks Exploding
Good Luck:)

Which of these is an example of a chemical change?

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