State three rules for writing the chemical formula
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Rules followed in writing chemical equations are:
1. A chemical equation should be written with the reactants (if there are two or more should be separated by ‘+’ symbol, same applicable to products) on the left side of an arrow and the products of the chemical reaction on the right side of the equation.
2. The head of the arrow should always points toward the right or toward the product side of the equation (sometimes indicate equilibrium with the reaction proceeding in both directions simultaneously).
3. The condition required for the reaction to proceed (say temperature, pressure, catalyst etc.) should be written on the top of the arrow.
4. The physical state of reactants and product should be informed by writing the state inside the bracket next to the reactants and product. If gas you need to write e.g. O2(g), similarly for liquids (l), solids (s), aqueous solutions (aq) etc.
5. Chemical equations should be balanced on the basis of law of conservation of mass, i.e. number of atoms of the elements on the left side(reactants) should be equal to number of atoms of same elements on right side(products).
An example of a balanced chemical equation following above rules may be seen in the combustion of methane:
heat
CH4 (g) + 2O2(g) -------→ CO2(g) + 2H2O(l)
Reactants(LHS) Products (RHS)
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1. A chemical equation should be written with the reactants (if there are two or more should be separated by ‘+’ symbol, same applicable to products) on the left side of an arrow and the products of the chemical reaction on the right side of the equation.
2. The head of the arrow should always points toward the right or toward the product side of the equation (sometimes indicate equilibrium with the reaction proceeding in both directions simultaneously).
3. The condition required for the reaction to proceed (say temperature, pressure, catalyst etc.) should be written on the top of the arrow.
4. The physical state of reactants and product should be informed by writing the state inside the bracket next to the reactants and product. If gas you need to write e.g. O2(g), similarly for liquids (l), solids (s), aqueous solutions (aq) etc.
5. Chemical equations should be balanced on the basis of law of conservation of mass, i.e. number of atoms of the elements on the left side(reactants) should be equal to number of atoms of same elements on right side(products).
An example of a balanced chemical equation following above rules may be seen in the combustion of methane:
heat
CH4 (g) + 2O2(g) -------→ CO2(g) + 2H2O(l)
Reactants(LHS) Products (RHS)
i hope u find this answer helpful
mark it as brainilist
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Answer:
The molecules of an element or a compound are represented by symbols in a molecular chemical formula.
Explanation:
- The following is the rule for writing chemical formulas:
- Write the symbols that have a positive charge valency first.
- Second, indicate each atom's valency at the top of its symbol.
- Thirdly, discard the positive or negative radicle and divide the valency number by their highest common factor. Alternate the radicle's valency.
- Lastly, affix the alternate valency number to the radicle's lower right.
- Each constituent element in a chemical formula is identified by its chemical symbol, along with the relative number of atoms that make up each element.
In empirical equations, these proportions start with a key element before allocating atom counts for the remaining components of the compound in relation to the key element.
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