p-Nitrobenzoic acid is an important organic compound with the chemical formula C7H5NO4. Understanding its relative mass is significant for chemical synthesis, analysis, and application.
What is Relative Mass?
Relative mass, often referred to as relative molecular mass (relative molecular weight), is the ratio of the mass of a molecule to 1/12 of the mass of a carbon-12 atom. It is a dimensionless quantity, representing the mass of a molecule relative to a reference mass. For organic compounds, the relative molecular mass is calculated by considering the atomic masses of the constituent atoms.
Calculation of the Relative Molecular Mass of p-Nitrobenzoic acid
The chemical formula of p-Nitrobenzoic acid is C7H5NO4. To calculate its relative molecular mass, we need to know the relative atomic masses of each constituent atom:
Carbon (C): 12.01
Hydrogen (H): 1.01
Nitrogen (N): 14.01
Oxygen (O): 16.00
Based on the formula C7H5NO4, the relative molecular mass of p-Nitrobenzoic acid can be calculated as follows:
Relative Molecular Mass
=7×12.01+5×1.01+1×14.01+4×16.00
Relative Molecular Mass=7×12.01+5×1.01+1×14.01+4×16.00
Adding these values together:
=7×12.01+5×1.01+1×14.01+4×16.00
=84.07+5.05+14.01+64.00
=167.13
Therefore, the relative molecular mass of p-Nitrobenzoic acid is 167.13.
Applications of the Relative Mass of p-Nitrobenzoic acid
Understanding the relative molecular mass of p-Nitrobenzoic acid has various applications in the fields of chemistry and industry:
Quantitative Analysis: In the laboratory, by weighing the mass of p-Nitrobenzoic acid and combining it with its relative molecular mass, the required amount of substance (in moles) can be calculated to accurately prepare reagents for chemical reactions.
Reaction Calculations: In chemical reactions, the relative molecular masses of reactants and products are used to balance chemical equations and calculate reaction yields and efficiency.
Molecular Weight Determination: In physical chemistry and analytical chemistry, determining the molecular weight of a compound can help identify and confirm the structure and composition of the compound.
Quality Control: In industrial production, by measuring the molecular weight of a product, the purity and quality of the product can be ensured to meet standard requirements.
The relative molecular mass of p-Nitrobenzoic acid is 167.13. This value has practical significance in chemical experiments and industrial applications. By accurately determining and calculating the relative molecular mass, we can better understand and utilize p-Nitrobenzoic acid optimizing its performance and effectiveness in various applications.