Which of the following is a chemical change? A. Burning paper  B. dropping glass  C. Dissolving salt in water  D. Melting iron  E. Mixing gold silver and copper to make a ring

Q: What is the difference between a physical change and a chemical change? List some examples of each.

A: Physical and chemical changes are observed in chemical reaction which gives the characteristics of a…

Q: The study of energy changes that accompany chemical and physical changes is known as? Select one: a.…

A: It is not definition of physical chemistry because it is interactions and transformations of…

Q: Which of the following is a chemical change? Explain your reasoning: (a) boiling canned soup; (b)…

A: The chemical change of the reaction has to be given,

Q: - Write a paragraph about the difference between a chemical and physical change. Give examples of…

A: To differentiate: Chemical and physical changes.

Q: What is a mixture? A. A solid gold ring B. Nitrogen and oxygen in a molecule C. Copper and lead…

A: A mixture is an homogeneous or heterogeneous solution in which different substances are present in…

Q: A baby's spoon with a surface area of 6.25 cm² is plated with silver from AgNO3 using a current 2 A…

A: Given : Surface are of spoon = 6.25 cm2  Current = 2 A And time = 2 hr 25 min = 145 mins…

Q: Classify each change as physical or chemical.  Sugar burns when heated on a skillet.

A: A physical change is a process which involves a substance changing its form or state and but its…

Q: 17. Based on the molecular diagram, classify each change as physical or chemical. a. b.

A: When we see the first reaction we see that there is no change in the composition of the reactants…

Q: (1.4)Which of the following is a chemical change? O cutting papers O rusting iron O breaking glasses…

A: Physical changes are the changes in physical properties of a substance. They are generally…

Q: following reactions as homogeneous or heterogene

A: Homogenous reactions include the reactants and products in the same phase. Heterogeneous reactions…

Q: 1. In a change, one kind of matter is turned into another. 2. A chemical reaction is accompanied by…

A: "Since there are multiple sub-parts in this question so I am solving only the first three sub-parts.…

Q: Classify each of the changes as a physical change or a chemical change.

A: Physical changes are the ones that are the ones do not involve any chemical reactions,i.e. the…

Q: Two solid objects, A and B, are both at room temperature and then placed in boiling water. The…

A: Heat capacity - it is the amount of heat required to change the temperature by 1 Degree.

Q: Two solid objects, A and B, are both at room temperature and then placed in boiling water. The…

A: Heat capacity is the amount of energy in the form of heat,  takes for increasing the temperature of…

Q: carving wood slicing an apple burning woodtearing aluminum fol bleaching skin snow melting frying an…

A: A chemical change occurs when two substances on combining bring about to form new substance. Which…

Q: Give an example of a chemical change, and explain what evidence supports that it is a chemical…

A:

Q: Dissolving suger is an example of-(a) Physical change(b) Chemical change(c) Redox Reaction(d) None…

A: Physical change: Changes in only size, shape, state or appearance of a substance not in a chemical…

Q: What are chemicals? Give some examples.

A: Any substance which is used in or produced by any reaction to bring change or to convert one…

Q: Mars is red due to red soil rich in iron oxide (rust).  Is the oxidation of soil to rust a PHYSICAL…

A:

Q: Which type of energy is stored in fuels?

A: A fuel is substance that can be made to react with other substances so that it releases energy in…

Q: What is another common situation in which a chemical change also leads to a physical change?

A:

Q: Describe the results of a physical change and list three examples of physicalchange.

A: In a physical change, the composition of the substance doesn't change. The identity of the substance…

Q: Digesting food is an example of what? A chemical change A physical change

A: Physical change :-  In this chemical composition of the substance does not change. Involve change in…

Q: In a solar box cooker sunlight falls on the and the food gets cooked by absorbing heat energy.

A: Mirror is used in a solar cooker to increase the radiation input on the absorbing space and is fixed…

Q: Caco, solid was grind then heated to decompose to carbon dioxide and calcium oxide. The change/s…

A: Physical Change: It is a process in which a substance undergoes changes in its physical form but not…

Q: 18. Based on the molecular diagram, classify each change as physical or chemical. b. C.

A: Physical changes are changes under which a substance undergoes a change in its physical properties.…

Q: Changing hydrogen and oxygen into water is a .... a. chemical change b. physical change c. double…

A: When a chemical change takes place bond between atom breaks and new bond forms. Thus when water is…

Q: Two solid objects, A and B, are both at room temperature and then placed in boiling water. The…

A: Heat capacity is amount of heat required by the object to change its temperature by degree 1.

Q: Describe the difference between a physical change and a chemical change.

A: A physical change is a change in which some properties of the substance change, but its identity…

Q: List four indicators that a chemical change has probably occured.

A: The changes which are not reversible and new substances or products are formed which posses…

Q: 12. Which picture shows an example of a chemical change taking place? LORV A B C

A: To determine which of the below picture shows chemical change.

Q: A nutrition table lists apples with a potassium content of 4600 mg/pound. Assume an average apple is…

A: According to the given data, Mass of an average apple = 75.0 g Because, 454 g = 1 poundMass of an…

Q: Give the description of accompanying changes of: A. Iron rusting B. Burning wood C. Cooking an…

A: a. Iron rusting Answer - According to the question - Rusting of iron is a chemical change because a…

Q: During a chemical change: A. Chemical composition changes  B. There is only a physical state change…

A: During a chemical change A. Chemical Composition changes

Q: What is a chemical property of a matter

A: A Matter is anything that occupy space ( volume) and gas a mass and it may be sensible by our one or…

Q: Which of the following is NOTA chemical change? O a. bicycle rusting O b. antacid neutralizes…

A:

Q: A Kool-aid solution has sugar and flavoring as the solute and water as the solvent. If ice cubes of…

A: Solvent is water solute is sugar Effect of melting of ice on sugar molecules = ?

Q: Change 2 Change 3 Change 1 Change 3 is: Change 1 is: OImpossible a physical change Change 2 is: O…

A: When the reactants react in a reaction and involves the breaking of bonds then this reaction is…

Q: In your own words, explain What are the differences between physical and chemical change.

A: Difference between physical and chemical change.

Q: Give 5 examples of Chemical Changes

A: Change of a particular matter or species into another matter or species having different properties,…

Q: Burning paper is a chemical change.

A: Chemical change is in which chemical composition is changed of the compound.

Q: Crushing an empty water bottle is a chemical change. Select one: O True O False

A: Crushing a bottle is a physical change. In this change Only shape of the bottle change and there is…

Q: Why is chemical theory successful? What are some of the limitations of the theory?

A: The chemical theory describes the physical phenomena which give rise to chemistry as well as the…

Q: Which f the following is an example of chemical change? O Filling up a balloon with hot air. O…

A: Chemical change is a process which results when a substance combines with another substance to form…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.