Question

Determine the number of moles of oxygen in 3.20 moles of sodium hydrogen phosphate.

Answer 1

The number of moles of oxygen present in 3.2 moles of sodium hydrogen phosphate is 12.8 moles.  

Further Explanation

An Atom

• An atom is the smallest particle of an element that can take part in a chemical reaction. For example, sodium atom, Na.  

A Molecule

• A molecule is a substance that is made up of one or more atoms. The atoms in a molecule may be similar or different making a compound.  

A compound  

• A compound is a substances that contains two or more different atoms that are bonded together. When the atoms are similar the substance is known as a molecule, therefore not all molecules are compounds.
• Sodium hydrogen phosphate is an example of a compound that contains sodium atom, two hydrogen atoms, one phosphate atom and four oxygen atoms.
• The formula of sodium hydrogen phosphate is NaH2PO4  

Therefore;

• One mole of Sodium hydrogen phosphate, NaH2PO4 contains;
• 1 mole of sodium atoms, two moles of hydrogen atoms, one mole of phosphate atom and four moles of oxygen atoms.

Thus;

1 mole of NaH2PO4 contains 4 moles of Oxygen  

3.2 moles of NaH2PO4 will contain =?

= 3.2 moles x 4  

= 12.8 moles  

Therefore;  

3.2 moles of NaH2PO4 contains 12.8 moles of Oxygen atoms.

Keywords: Compound, Mole, atoms  

Learn more about:  

• Compounds: https://brainly.com/question/1194814
• Atoms: https://brainly.com/question/12505687
• Percentage composition by mass in compounds: https://brainly.com/question/9118852

Level: High school  

Subject: Chemistry  

Topic: Compounds and mixtures  

Sub-topic: Composition of compounds  

Answer 2

$\boxed{12.8\;{\text{moles}}}$ of oxygen are present in 3.20 moles of ${\text{N}}{{\text{a}}_{\text{2}}}{\text{HP}}{{\text{O}}_{\text{4}}}$ .

Further Explanation:

Mole is a measure of the amount of substance. It is defined as the mass of a substance that has the same number of fundamental units as there are atoms in 12 g of carbon-12. Such fundamental units can be atoms, molecules or formula units.

The structure of sodium hydrogen phosphate $\left({{\bf{N}}{{\bf{a}}_{\bf{2}}}{\bf{HP}}{{\bf{O}}_{\bf{4}}}}\right)$ is attached in the image.

In  ${\text{N}}{{\text{a}}_{\text{2}}}{\text{HP}}{{\text{O}}_{\text{4}}}$, the central atom phosphorus is bonded to four oxygen atoms. The one oxygen is bonded to phosphorous by double bond while the other three are bonded by phosphorous atom by single bonds. The two single bonded oxygen atoms are attached to sodium atom while one single bonded oxygen atom is bonded to hydrogen.

Therefore 1 mole of ${\text{N}}{{\text{a}}_{\text{2}}}{\text{HP}}{{\text{O}}_{\text{4}}}$ contains 2 mole of sodium, 1 mole of hydrogen and 4 moles of oxygen atoms.

Number of moles of oxygen in 1 mole of ${\text{N}}{{\text{a}}_{\text{2}}}{\text{HP}}{{\text{O}}_{\text{4}}}$= 4

So the number of moles of oxygen in 3.20 moles of ${\text{N}}{{\text{a}}_{\text{2}}}{\text{HP}}{{\text{O}}_{\text{4}}}$ is calculated as follows:

$\align{{\text{Moles of O}}&=\left({3.20\;{\text{mol}}\;{\text{N}}{{\text{a}}_{\text{2}}}{\text{HP}}{{\text{O}}_{\text{4}}}}\right)\times\left({\frac{{4\;{\text{mol}}\;{\text{O}}}}{{1\;{\text{mol}}\;{\text{N}}{{\text{a}}_{\text{2}}}{\text{HP}}{{\text{O}}_{\text{4}}}}}}\right)\cr&=\boxed{12.8\;{\text{mol}}}\cr}$

So, 3.20 moles of ${\bf{N}}{{\bf{a}}_{\bf{2}}}{\bf{HP}}{{\bf{O}}_{\bf{4}}}$  contain 12.8 moles of O.

Learn more:

1. Identification of ionic bonding: https://brainly.com/question/1603987

2. Calculation of moles of ions: https://brainly.com/question/5950133

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Mole concept

Keywords: sodium, hydrogen, phosphorous, oxygen, Na2HPO4, atoms, moles, carbon, 12 g, 3.20 moles, 12.8 moles, single bond and double bond.