Write the formula for each of the following substances,...

Write the formula for each of the following substances, listing the elements in the order given. a. List the phosphorus atom first. b. a molecule containing two boron atoms and six hydrogen atoms c. a compound containing one calcium atom for every two chlorine atoms d. List the carbon atom first. e. a compound containing two iron atoms for every three oxygen atoms f. a molecule containing three hydrogen atoms, one phosphorus atom, and four oxygen atoms

Write the formula for each of the following substances, listing the elements in the order given.
a. List the phosphorus atom first.
b. a molecule containing two boron atoms and six hydrogen atoms
c. a compound containing one calcium atom for every two chlorine atoms
d. List the carbon atom first.
e. a compound containing two iron atoms for every three oxygen atoms
f. a molecule containing three hydrogen atoms, one phosphorus atom, and four oxygen atoms

Key Concepts

Chemical Formula Representation

A chemical formula is a way of expressing information about the atoms that constitute a particular chemical compound. It uses standard chemical symbols with subscripts to indicate the number of each type of atom present in the compound, thus providing a concise description of its composition.

Use of Subscripts

Subscripts in chemical formulas are numbers written immediately after the symbols of the elements. They specify the number of atoms of that element in a molecule or formula unit. This notation ensures that the proportion of each element in the compound is accurately represented.

Element Ordering in Chemical Formulas

When writing chemical formulas, the order of the elements can be important, especially when specific instructions are given for listing. This means that elements may be arranged according to particular guidelines—such as putting a specific element first—ensuring that the formula adheres to the required format or conventional ordering rules.

Stoichiometry

Stoichiometry involves the calculation of the relative quantities of reactants and products in chemical reactions, and in the context of writing chemical formulas it refers to the ratio of atoms of different elements in a compound. This concept ensures that the empirical or molecular formula reflects the correct proportions as indicated in a problem statement.

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