What is the evidence that a chemical reaction took place?

Q: If you mix two substances together, how do you know what happens is a chemical reaction? (

A: To explain how to know whether a chemical reaction has occur on mixing two substances.

Q: Is there a destruction or change in matter during chemical reaction? Support your answer in 200…

A: Matter :-  Any thing which has mass and occupy some space is called as matter  Matter can be broadly…

Q: What does it mean when it says "Chemical reaction changes the actual chemical itself."

A: Given: "Chemical reaction changes the actual chemical itself".

Q: The substance produced by a chemical reaction is called

A:

Q: State the law of conservation of mass and energy as it applies to a chemical reaction.

A: The law of conservation of mass and energy it applies to a chemical reaction has to be stated below.

Q: Which process is a chemical reaction?(a) Gasoline evaporating from a gasoline tank(b) Iron rusting…

A: A chemical reaction is that process in which one or more reactants react with each other and form…

Q: is a chemical reaction and a chemical change the same

A:

Q: What are reactants and products in a chemical reaction?

A: In any chemical reaction reactants are taken initially and they react with each other and form…

Q: Which of the following is a property attributed solely to chemical change?     Change of color due…

A:

Q: How do you know (evidence) that a chemical reactions has occurred. Give specific evidence at least.

A: Chemical reaction is process by which new products are formed as a result of the reaction between…

Q: What are four observations used to indicate a chemical change?

A:

Q: Is there a destruction or change in matter during chemical reaction? Support your answer in your own…

A: In a chemical reaction neither any matter created or destroyed. From Law of conservation of…

Q: Reaction Reaction Substances + heat + water with red litmus with blue litmus Magnesium Sulfur

A: The substances or molecules that turns blue litmus paper into red are acidic in nature. And the…

Q: Which of the following represents a chemical change? O mixing salt and sand O paper burning O…

A: Chemical change : a chemical change always results into one or more new substances i.e substances…

Q: 2 PMeCl2 + B2O3 SnO₂ Li[AIH4] 3 H2O 5 Br2 excess C, A - 2 СО 2 AsBr5 2 H2O2 - 2 H2O 5 EtMgBr - 5…

A:

Q: Very concisely, give the general definition of terms concentration and chemical standards.

A: •CONCENTRATION and CHEMICAL STANDARD these term are used together in titration chemistry.…

Q: Dropping bluestone into water guves a blue soultuon. Is that a chemical or physical reaction?

A: In a physical change, a substance undergoes changes only in its physical properties such as shape,…

Q: What is the term for the modification of a substance that does not alter its chemical composition?…

A: Chemical change: In chemical change composition of the substance changes. When bonds are broken and…

Q: Which is an example of a chemical change? (Hint: Review the common signs of chemical reaction.) Salt…

A: A chemical change occurs when any substance combines with another to form a totally different…

Q: Ethanol Propan-2-ol 2-methylpropan-2-ol Phenol Ferric chloride Sodium Metal

A:

Q: What is the difference between a physical and chemical change? Give at least three signs of a…

A: Difference  between  chemical  change  and  physical  change.  Physical change is a type of change…

Q: Propan-1-ol Propan-2-ol 2-methylpropan-2-ol Lucas test

A: Lucas test is performed to differentiate primary, secondary and tertiary alcohol. In this test, the…

Q: X 12. Which of the following is not 0/1 something which happens during a chemical change: * Gas is…

A: In a chemical change, reactants are converted into the products.

Q: The new substances formed during a chemical reaction are known as

A: A chemical reaction is the process in which atoms present in the starting substances rearrange to…

Q: ТСРВА

A: The compound in which two of the carbon atoms of a hydrocarbon chain are bonded to each other by a…

Q: 5. TRUE or FALSE a) Chemical reaction is an example of chemical change. b) Rusting of iron shows a…

A:

Q: Hydrogen, when combined with oxygen in a chemical reaction, forms water. This is an example of which…

A:

Q: Use the References to access important values if needed for this question. Under certain conditions,…

A: Given : dissociation of HBr  Tip: law of conservation of mass

Q: The dictionary defines homogeneousas “uniform in compo-sition throughout.” River water is a mixture…

A: Heterogeneous mixture: A mixture in which components combine to give a non-uniform composition is…

Q: Explain this quote: "Chemical reaction changes the actual chemical itself.

A: A question based on general chemistry that is to be accomplished.

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: Define chemical change and list several indications that a chemical change has taken place.

A: When a substance undergoes a chemical change, its molecular composition is changed entirely. It…

Q: The reaction between magnesium and hydrochloric acid is a single displacement reaction which…

A: In this question, we have to give a balanced chemical equation, write reaction between magnesium and…