Question

Extend your knowledge keeping in mind the rules for reading andwriting chemical formulas. Write down the chemical formula of sodium sulfite and say what the total number of atom is? Use the following key words and expretions: to be equal(to), the number of,atom, molecule

A chemical formula is the short scientific method of representing onemolecule of an element or a compound.

A chemical formula is written using the symbol of the element, the formula of the radical and their valence. The following steps are involved inwriting a formula:

1. Write down the symbols of the elements/ions, which combine to form amolecule of the compound, side by side.

2. Write the valencies of the elements /ions as the superscript on the righthand side.

3. Interchange the valencies of the elements /ions and write as the subscript

4. The radical must be written in brackets, before the subscript is written.

5. Whenever applicable, simple ratios of the valencies must be written.

6. The final formula is written without any sign of the charge.

Chemical equation – а chemical equation may be described as achemical reaction or a means of writing out and describing such a phenomenon. The coefficients next to the symbols and formulae of entities are the absolute values of the stoichiometric numbers. The first chemical equation wasdiagrammed by Jean Beguin.

Form

A chemical equation consists of the chemical formulas of the reactants (the

starting substances) and the chemical formula of the products (substancesformed in the chemical reaction). The two are separated by an arrow symbol( , usually read as "yields") and each individual substance's chemical formula is separated from others by a plus sign.

As an example, the formula for the burning of methane can be denoted:

CH4 + 2 O2→ CO2 + 2 H2O

This equation would be read as "CH four plus O two yields CO two and Htwo O." But for equations involving complex chemicals, rather than readingthe letter and its subscript, the chemical formulas are read using IUPAC nomenclature. Using IUPAC nomenclature, this equation would be read as"methane plus oxygen yields carbon dioxide and water."

This equation indicates that oxygen and CH4 react to form H2O and CO2. It

also indicates that two oxygen molecules are required for every methanemolecule and the reaction will form two water molecules and one carbon dioxide molecule for every methane and two oxygen molecules that react

Answer 1

Answer:

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