19. When limestone is subjected to high heat, it becomes calcium oxide and releases carbon dioxide gas. This change in limestone at a given temperature is an example of: A. A physical change like the melting of ice B. A chemical change like the rusting of iron C.A chemical change like the hardening of melted butter D.A physical change like wood burning

Q: Can a chemical change result's in no new substances。?

A: Physical change: Physical change involves one phase to another phase without breaking or making the…

Q: The famous frenchman who invented a process was .......? The famous German who had a set of…

A: To write: The famous Frenchman who invented a process was .......? The famous German who had a set…

Q: e shows the number chemical Change C cal Reaction Read of the following state hemical reaction A, b…

A: Types of chemical reaction 1. Chemical combination reaction or synthesis reaction 2. Chemical…

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: a. A container of nonstick cooking spray explodes when thrown into a fire. b. The air in a hot-air…

A: The kinetic theory of gases is a basic, culturally interesting model of the thermodynamic behavior…

Q: 21. Which of the following reactions releases most energy to the surroundings? *

A: l

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

A: To differentiate: Chemical and physical changes.

Q: 8. Based on the observations above, does a chemical reaction take place When you MIx thnese…

A:

Q: Consider the following unbalanced particulate representation of a chemical equation: I= purple F=…

A: In the shown representation: purple color represents Iodine atom Green color represents fluorine…

Q: Combustion of hydrocarbons such as propane (C,Hg) produces carbon dioxide, a "greenhouse gas."…

A: Burning of Compound in presence of oxygen is called Combustion and products are CO2 gas and H2O…

Q: b My Questions | bartleby 101 Chem101 -> app.101edu.co Submit Question 4 of 29 A state function is…

A:

Q: A chemical change

A: Chemical changes occurs when a substance reacts with another substance which results in the…

Q: following reactions as homogeneous or heterogene

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

Q: Solid iron(III) oxide reacts with hydrogen gas to form solid iron and liquid water. Write the…

A: We have to predict the balance chemical reaction.

Q: When heat is added to a solid, what will happen to the particles of that solid?

A: Solid  is stable in shape or we can say it has a defined shape and volume . For example ; ice is a…

Q: 2. How much heat is lost when a 640 g piece of copper cools from 375 °C, to 26

A: When a solid substance is cooling then heat is lost . It can be determined by the following formula-…

Q: According to the graph below, is this reaction exothermic or endothermic? Time O Endothermic because…

A: the given graph is,

Q: If the mass of the hot water is -67.46 and initial temperature of hot water is 51.0 and mass of cold…

A: First, the amount of heat absorbed by the cold water is determined.

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

A:

Q: 20. Dissolving the salt potassium nitrate in water is an endothermic reaction. What would be…

A: The dissolution of potassium nitrate salt in water is an endothermic reaction. As the potassium…

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: How does adding a little amount and a greater amount of sugar affect the time it would took for the…

A: How does adding a little amount and a greater amount of sugar affect the time it would took for the…

Q: What kind of change happens when copper metal turns green, and what kind of change happens when…

A: Due presence of O2 and water in air the Cu oxidizes to CuS04 which is green coloured . This is the…

Q: Define chemical change.

A: Chemical changes are those changes in which elements combine together to form entirely a new…

Q: Why cannot a chemical change be normally reversed?

A: Matter can exist in three states of matter; solid, liquid and gases. A substance can convert to…

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

A: Thermochemistry

Q: It is the combination of two or more substances that are not chemically combined, and a new…

A: Combination of two or more substances that are not chemically combined means that chemical bonds are…

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: 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: n this experiment, we will be making waste aluminum into Q: 1 Eelect one: Aluminum foil to use in…

A:

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 student modeled the exothermic synthesis reaction that occurs when solid iron and liquid sulfur…

A:

Q: What kind of change is ripping a piece of paper towel from the roll, and what kind of change is…

A: Ripping a piece of paper towel from the roll is a physical change as here the piece of paper is…

Q: What is the difference between a physical change and a chemical change?

A: The difference between physical and chemical change are given by

Q: An iron nail rusting is an example of a change.

A: Rusting : A process in which iron turns into its oxide that is iron oxide.  Rusting occurs when iron…

Q: When two solutions are combined in a test tube, they quickly react and the test tube containing the…

A: To know about the type of Chemical Reaction, know the meaning of exothermic and endothermic…

Q: Crushing an automobile at an auto wrecking yard is an example of a chemical change because the car…

A: There are two types of changes in matter physical change and chemical change. When a substance…

Q: What are the properties of Chemical changes?

A:

Q: The combustion of one mole of liquid octane, CH3(CH2)6CH3,produces 5470 kJ of heat. Calculate how…

A: 1 gallon (gal) = 3785.411784 gram (g) The molar mass of Octane =114.23 g/mol Therefore 114.23 g of…

Q: en billion molecules of water is decomposed into hydrogen and oxygen. How many molecules of hydrogen…

A: Number of molecules of water = 109 molecules We know that,  Number of molecules of water = Number of…

Q: A block of iron forming a pool of the liquid metal is correctly classified as A) Chemical change…

A: Physical change : is the change of matter that occurs without change of the chemical composition. It…

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: What are the properties of physical changes

A: Physical change is the change in physical state of the substance.

Q: exothermic reaction is one that in the chemical process:Immersive Reader

A: An exothermic reaction is one that in the chemical process:Immersive Reader A) absorbs energy. B)…