According To The Law Of Conservation Of Matter, Which Statement About Chemical Reactions Is True?

According To The Law Of Conservation Of Matter, Which Statement About Chemical Reactions Is True
Answers –

  1. The law of conservation of matter states that in any given system that is closed to the transfer of matter, the amount of matter in the system stays constant
  2. The law of conservation of matter says that in chemical reactions, the total mass of the products must equal the total mass of the reactants.

What statement about chemical reactions is true?

In a chemical reaction formation of new products take place and mass is conserved in a chemical reaction as the mass of the reactants before the reaction is equal to the mass of the products after reaction. Therefore, option D is correct.

What is the law of conservation for chemical reactions?

The Law of Conservation of Mass – The Law of Conservation of Mass dates from Antoine Lavoisier’s 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.

  1. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system.
  2. Lavoisier’s finding laid the foundation for modern chemistry and revolutionized science.
  3. The Law of Conservation of Mass holds true because naturally occurring elements are very stable at the conditions found on the surface of the Earth.

Most elements come from fusion reactions found only in stars or supernovae. Therefore, in the everyday world of Earth, from the peak of the highest mountain to the depths of the deepest ocean, atoms are not converted to other elements during chemical reactions.

Because of this, individual atoms that make up living and nonliving matter are very old and each atom has a history. An individual atom of a biologically important element, such as carbon, may have spent 65 million years buried as coal before being burned in a power plant, followed by two decades in Earth’s atmosphere before being dissolved in the ocean, and then taken up by an algal cell that was consumed by a copepod before being respired and again entering Earth’s atmosphere (Figure 1).

The atom itself is neither created nor destroyed but cycles among chemical compounds. Ecologists can apply the law of conservation of mass to the analysis of elemental cycles by conducting a mass balance. These analyses are as important to the progress of ecology as Lavoisier’s findings were to chemistry. Figure 1: Hypothetical pathway of a carbon atom through an ecosystem Because elements are neither created nor destroyed under normal circumstances, individual atoms that compose living organisms have long histories as they cycle through the biosphere.

Which are true about chemical reactions according to the law of conservation of mass?

According to the law of conservation of mass, the mass before and after a chemical reaction remains the same. So the mass of the reactants is equal to the mass of the products.

Which one of the following is true for all chemical reaction?

Chemical reactions are irreversible i.e. they can neither be interchanged nor can be reversed.

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Which of the following is true of a chemical reaction quizlet?

Which of the following is true for all chemical reactions? The total mass of the reactants equals the total mass of the products.

Why does the law of conservation of mass apply to chemical reactions?

Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.

Which of the following reaction is not correct according to the law of conservation of mass?

Which of the following reactions is not correct according to the law of conservation of mass.14

Only in equation → ii), the reactants and products are not balanced. The unbalanced equation goes against the law of conservation of mass. The correct answer is → ii).

: Which of the following reactions is not correct according to the law of conservation of mass.

Which of the following statements best explains the law of conservation of mass concerning a chemical change?

Which of the following statements best defines the law of conservation of mass? Mass cannot be created but it can be destroyed under extreme pressures. No worries! We‘ve got your back. Try BYJU‘S free classes today! Mass cannot be conserved during a chemical reaction; a little bit of mass is always lost.

No worries! We‘ve got your back. Try BYJU‘S free classes today! The mass of a closed system cannot change over time; mass cannot be created nor destroyed. Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses When added to a system, energy can destroy mass. No worries! We‘ve got your back.

Try BYJU‘S free classes today! Open in App Suggest Corrections 0 : Which of the following statements best defines the law of conservation of mass?

Which of the following is true of the the law of conservation of energy?

The law of conservation of energy states that energy can neither be created nor destroyed – only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it’s added from the outside. This is particularly confusing in the case of non-conservative forces, where energy is converted from mechanical energy into thermal energy, but the overall energy does remain the same.

is the total internal energy of a system, is the initial internal energy of a system. is the work done by or on the system. is the heat added to, or removed from, the system.

It is also possible to determine the change in internal energy of the system using the equation: This is also a statement of the first law of thermodynamics, While these equations are extremely powerful, they can make it hard to see the power of the statement.

The takeaway message is that energy cannot be created from nothing. Society has to get energy from somewhere, although there are many sneaky places to get it from (some sources are primary fuels and some sources are primary energy flows ). Early in the 20 th century, Einstein figured out that even mass is a form of energy (this is called mass-energy equivalence ).

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The amount of mass directly relates to the amount of energy, as determined by the most famous formula in physics:

is the amount of energy in an object or system. is the mass of the object or system. is the speed of light, roughly,

Which of the following is true according to the law of conservation?

According to the law of conservation of energy, energy cannot be created or destroyed, although it can be changed from one form to another.

Which of the following statement about chemical reaction is not correct?

Hence option (a)) Heat may be given out but never absorbed. is the incorrect statement.

Which of the following is are correct with respect to the chemical reactions?

Which of the following is/are correct with respect to the chemical reactions? Chemical compositon changes Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses We can’t obtain the intial reactants by simple physical means like filtering, dissolving etc. Suggest Corrections 1 : Which of the following is/are correct with respect to the chemical reactions?

Which of the following statements is not true about the chemical reaction?

‘(b) The number of atoms of each element remains the same before and after a chemical reaction ‘ is an incorrect statement.

Which of the following statements about a chemical reaction is true a the total mass?

Which of the following statements is true?A. The total mass of the system remains same in a chemical changeB. A chemical change is permanent and irreversibleC. A physical change is temporary and reversibleD. All of the above Answer Verified Hint: By principle of conservation of mass, the total mass before and after reaction does not change.

But the phases of the molecules may change based on the conditions. The shape, phase, size of the individual materials of the reaction may change but can be reversed back if the conditions change. But once the reaction is done, the products cannot be turned to reactant again. Complete step by step solution: A chemical reaction takes place where reactants completely convert into products.

Altogether new sets of molecules are created out of the molecules in the reactants. But by principle of conservation of mass the total mass of the reactants remains the same as the mass of the products after the chemical reaction. Thus options A and B are correct.

A physical change involves change in the shape, size, form the material in which the reactants and products are in. Even the phase change of the material comes under the umbrella of physical changes. Physical changes means that there is no change in the molecular structure of the material but the matter can be in any form based on the conditions.

These changes are reversible. Therefore, we can say that option D is the correct answer.Note: When we say chemical changes are irreversible it is because once the products are created out of reactants then it requires another set of chemical reactions to bring back the original products.

  1. Whereas in physical changes, the melting, mixing of material can be reversible without changing the individual chemical composition.
  2. Which of the following statements is true?A.
  3. The total mass of the system remains same in a chemical changeB.
  4. A chemical change is permanent and irreversibleC.
  5. A physical change is temporary and reversibleD.
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All of the above

Which of the following is true of chemical change?

A chemical change occurs with the change in composition. It cannot be reversed and is permanent in nature.

Which of the following describes chemical reaction?

Scientific view – All materials are made of chemicals. Chemical reactions involve interaction between chemicals such that all reactants are changed into new materials. The properties of the new materials are different from those of the reactants. This is distinct from other changes such as evaporation, melting, boiling, freezing and mixing where changes involve no new substances.

While heat is often necessary to start reactions, this need not be the case. Chemical reactions involve breaking chemical bonds between reactant molecules (particles) and forming new bonds between atoms in product particles (molecules). The number of atoms before and after the chemical change is the same but the number of molecules will change.

Although many chemical reactions proceed quickly, small, slow changes such as rusting or biological processes can take place over much longer periods of time. Chemical reactions are reversible (a fact often omitted in many science texts) but in practice most differ from other changes children observe, such as melting, by being very difficult to reverse.

Which is statement correctly describes a chemical reaction?

Expert-Verified Answer Bonds between atoms break and reform correctly describes a chemical reaction.

What is a fact about chemical reactions?

Scientific view – All materials are made of chemicals. Chemical reactions involve interaction between chemicals such that all reactants are changed into new materials. The properties of the new materials are different from those of the reactants. This is distinct from other changes such as evaporation, melting, boiling, freezing and mixing where changes involve no new substances.

While heat is often necessary to start reactions, this need not be the case. Chemical reactions involve breaking chemical bonds between reactant molecules (particles) and forming new bonds between atoms in product particles (molecules). The number of atoms before and after the chemical change is the same but the number of molecules will change.

Although many chemical reactions proceed quickly, small, slow changes such as rusting or biological processes can take place over much longer periods of time. Chemical reactions are reversible (a fact often omitted in many science texts) but in practice most differ from other changes children observe, such as melting, by being very difficult to reverse.

Which statement is correct about chemical equation?

A chemical equation tells us about the substances involved in a reaction. A chemical equation informs us about the symbols and formulae of the substances involved in a reaction. A chemical equation tells us about the atoms or molecules of the reactants and products in a reaction. All are correct.