Chemistry
Grade-9
Easy
Question
The average atomic mass is the average weight of the isotopic masses of the element that is present in the isotopes of the element.
- True
- False
Hint:
Consider the case of chlorine.
The correct answer is 'True'.
The average atomic mass is the average weight of the isotopic masses of the element that is present in the isotopes of the element.
Let us consider the case of chlorine. Chlorine has two isotopes Cl-35 and Cl-37. Cl-35 is present in 75% and Cl-37 is present in 25%.
The average atomic mass = (0.75
35 + 0.2537) = 35.5 amu, which is atomic mass of chlorine. The statement is true.
Related Questions to study
Chemistry
Relative atomic mass of a compound can be calculated by the relative atomic mass of individual atoms
Relative atomic mass of a compound can be calculated by the relative atomic mass of individual atoms
ChemistryGrade-9
Chemistry
Statement-1: The relative atomic mass of sodium carbonate is 286
Statement -2: The relative atomic mass of Aluminum sulphate is 132
Statement-1: The relative atomic mass of sodium carbonate is 286
Statement -2: The relative atomic mass of Aluminum sulphate is 132
ChemistryGrade-9
Chemistry
Formula mass unit of ZnO?
Formula mass unit of ZnO?
ChemistryGrade-9
Chemistry
Which of the following contains the maximum number of atoms?
Which of the following contains the maximum number of atoms?
ChemistryGrade-9
Chemistry
What is meant by 1 u or 1 amu?
What is meant by 1 u or 1 amu?
ChemistryGrade-9
Chemistry
How many moles of Oxygen are present in 88gms of Carbon dioxide?
How many moles of Oxygen are present in 88gms of Carbon dioxide?
ChemistryGrade-9
Chemistry
5 moles of CO2 are present in a gaseous sample. How many molecules of carbon dioxide are present in the sample?
5 moles of CO2 are present in a gaseous sample. How many molecules of carbon dioxide are present in the sample?
ChemistryGrade-9
Chemistry
What is the molecular mass and gram molecular mass of HNO3?
What is the molecular mass and gram molecular mass of HNO3?
ChemistryGrade-9
Chemistry
What is the mass of one molecule of nitrous acid?
What is the mass of one molecule of nitrous acid?
ChemistryGrade-9
Chemistry
Which of the following will contain the same number of atoms as 20g of calcium?
Which of the following will contain the same number of atoms as 20g of calcium?
ChemistryGrade-9
Chemistry
What is the molecular mass of sucrose?
What is the molecular mass of sucrose?
ChemistryGrade-9
Chemistry
______ is the sum of atomic masses of the elements present in a molecule.
______ is the sum of atomic masses of the elements present in a molecule.
ChemistryGrade-9
Chemistry
What is the average atomic mass of the sample having 70% carbon-12 and 30% carbon-14?
What is the average atomic mass of the sample having 70% carbon-12 and 30% carbon-14?
ChemistryGrade-9
Chemistry
Calculate the average atomic mass of nitrogen isotope (14N and 15N) present in the atmosphere?
Calculate the average atomic mass of nitrogen isotope (14N and 15N) present in the atmosphere?
ChemistryGrade-9
Chemistry
What is the mass of hydrogen in terms of amu?
What is the mass of hydrogen in terms of amu?
ChemistryGrade-9
