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The number of atoms in the reactant and products must be equal to obey the law of conservation of mass.

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Q: Why must chemical equations be balanced using coefficients?
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Calculations using balanced equations are called?

Stoichiomeric calculations


What is the first step in balancing a chemical reaction?

Rules of balancing chemical equations:1. write the unbalanced equation2. count the number of atoms of the same element on reactant and product side of equation3. make the number of atoms the same by changing the coefficients, not subscripts4. balance hydrogen and oxygen last5. reduce coefficients if possibleThe first step in balancing a chemical equation is identifying all elements.For example:H2OSo the elements you would identify are H (hydrogen) and O (oxygen).--------------------------------------------------------------------------------------------------------b. identify the reactants and products. - (e2020)


True or false The key to using the elimination method is to find variable terms in the two equations that have equal or opposite coefficients?

True


What type of equation describes a chemical reaction in which each side of the equation has the same number of atoms of each element and mass is conserved?

All properly balanced chemical equations fit that criteria: they must have the same number of atoms of each element on each side of the "yield" arrow. Balancing an equation can be achieved by using whole number coefficients as needed. This upholds the Law of Conservation of Mass, which states that matter cannot be created or destroyed.


What is a mathematical statement that has two unequal quantities?

The key to using the elimination method is to find variable terms in two equations that have unequal coefficients


What are the reactions that form non metal oxides and acid rain using balanced symbol equations?

cat


What are the advantages of chemical equations?

Well chemical equations can help us understand how a certain substance is made and what combines with what to make it using symbol and word equations .It makes more understanding of the concepts through symbols.


Write the symbol equation for this reaction?

Symbol equations for reactions are written using chemical formulae.


What are the advantages and disadvantages of equations?

Well chemical equations can help us understand how a certain substance is made and what combines with what to make it using symbol and word equations but if you dont know your elements it can be a problem


What a short easy way to show a chemical reaction using symbols?

Writing a chemical reaction with symbols: Ex.: NaCl + AgNO3 = AgCl (s) + NaNO3 A mathematical (digital) system for the writing of chemical equations exist but it is rarely used.


What is the key to using the elimination method to find variable terms in the two equations that have equal or opposite coefficients?

Eliminate the variables that have equal coefficients but opposite in sign.x + 2y = 103x - 2y = 14Or you can work to have one of the variables with equal coefficients but opposite in sign such as:3x + 2y = 5x + y = 2 multiply by -2 to both sides3x + 2y = 5-2x - 2y = -4


If a polynomial cannot be factored using integer coefficients then it is?

In that case, it may, or may not, be possible to factor it using non-integer coefficients.