why should a chemical equations be balance ?
what is force ?
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Answers
Answer:
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Explanation:
Chemical reaction is just a rearrangement of atoms. It can neither create nor destroyed during the course of a chemical reaction. Chemical equations must be balanced to satisfy the law of conservation of matter, that states that matter cannot be produced or destroyed in a closed system.
In physics, a force is any influence that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity.
Answer:
We have to remember that the law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.
According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
The law of conservation of mass is useful for a number of calculations and can be used to solve for unknown masses, such as the amount of gas consumed or produced during a reaction.
Thus, it can be rightly said that an equation (chemical equation to be more specific) must be balanced so that it obeys the law of conservation of masses. The number of atoms of reactants should be equal to the number of atoms of the products formed after the successful completion of a reaction.
If we observe an element that is seen in more than time in one formula on a given side of the equation, we have to compute the number of atoms and then add them together.
An unbalanced equation is said to have an unequal number of atoms on either side of the reaction. For example,
KMnO4→K2MnO4+MnO2+O2KMnO4→K2MnO4+MnO2+O2
(Unbalanced)
In this reaction of decomposition of potassium permanganate, the equation is unbalanced. The number of atoms of K, Mn and O is unequal before and after the reaction, thus disobeying the law of conservation of mass. However, on balancing the reaction, we have
2KMnO4→K2MnO4+MnO2+O42KMnO4→K2MnO4+MnO2+O4
(Balanced)
The above equation obeys the law of conservation of masses since the number of atoms of all the elements taking part in the reaction are equal before and after the reaction.
force is a push or pull upon an object resulting from the object's interaction with another object.
By crystiii