
Find the mass of lead atom. Given the molecular weight of lead is
A.
B.
C.
D.
Answer
509.4k+ views
Hint: If we want the weight in grams of lead, simply divide the molecular weight by the Avogadro’s number.
The mass of an atom can be calculated using the formula,
Mass of an atom
Complete step by step answer:
We know that the molar mass is the mass of one mole of the substance. The unit of molar mass is
A mole of a substance is equal to Avogadro’s number of that substance.
Given,
The molecular weight of the substance is
We already have seen that one mole of a substance is equal to
Using the formula,
Mass of an atom
Mass of an atom
Mass of an atom
The obtained value is equal to option (D).
Additional Note:We can calculate the molecular weight by adding the mass of an atom multiplied by the number of atoms present in the molecule.
For Example, The molecular weight of the is calculated as,
We know the atomic weight of carbon is and the atomic weight of hydrogen is
Therefore, the molecular weight of the
Note:
We must know that the atomic mass of the substance is the sum of protons or electrons in an atom. For example, the atomic mass of carbon is 6 which means the number of electrons is six.
The molecular weight of molecules is determined by various methods:
Mass spectrometry: This method is usually used in determining the mass of small molecules.
Hydrodynamic method: In this method weight is found out by Mark-Houwink relations.
Static Light scattering method: In this method molecular weight is determined from the amount of light scattered using the Zimm method.
-The reaction is also used for the industrial preparation of 3-hydroxy-2-naphthoic acid which is the starting material to azo dyes and pigments.
-We can prepare aspirin by reacting salicylic acid with acetic anhydride. Aspirin is generally used as a painkiller.
The mass of an atom can be calculated using the formula,
Mass of an atom
Complete step by step answer:
We know that the molar mass is the mass of one mole of the substance. The unit of molar mass is
A mole of a substance is equal to Avogadro’s number of that substance.
Given,
The molecular weight of the substance is
We already have seen that one mole of a substance is equal to
Using the formula,
Mass of an atom
Mass of an atom
Mass of an atom
The obtained value is equal to option (D).
Additional Note:We can calculate the molecular weight by adding the mass of an atom multiplied by the number of atoms present in the molecule.
For Example, The molecular weight of the
We know the atomic weight of carbon is
Therefore, the molecular weight of the
Note:
We must know that the atomic mass of the substance is the sum of protons or electrons in an atom. For example, the atomic mass of carbon is 6 which means the number of electrons is six.
The molecular weight of molecules is determined by various methods:
Mass spectrometry: This method is usually used in determining the mass of small molecules.
Hydrodynamic method: In this method weight is found out by Mark-Houwink relations.
Static Light scattering method: In this method molecular weight is determined from the amount of light scattered using the Zimm method.
-The reaction is also used for the industrial preparation of 3-hydroxy-2-naphthoic acid which is the starting material to azo dyes and pigments.
-We can prepare aspirin by reacting salicylic acid with acetic anhydride. Aspirin is generally used as a painkiller.
Latest Vedantu courses for you
Grade 10 | CBSE | SCHOOL | English
Vedantu 10 CBSE Pro Course - (2025-26)
School Full course for CBSE students
₹37,300 per year
Recently Updated Pages
Master Class 11 Physics: Engaging Questions & Answers for Success

Master Class 11 Chemistry: Engaging Questions & Answers for Success

Master Class 11 Biology: Engaging Questions & Answers for Success

Class 11 Question and Answer - Your Ultimate Solutions Guide

Master Class 11 Business Studies: Engaging Questions & Answers for Success

Master Class 11 Computer Science: Engaging Questions & Answers for Success

Trending doubts
Explain why it is said like that Mock drill is use class 11 social science CBSE

The non protein part of an enzyme is a A Prosthetic class 11 biology CBSE

Which of the following blood vessels in the circulatory class 11 biology CBSE

What is a zygomorphic flower Give example class 11 biology CBSE

The deoxygenated blood from the hind limbs of the frog class 11 biology CBSE

What is the function of copulatory pads in the forelimbs class 11 biology CBSE
