Chemistry
Grade-9
Easy
Question
_____________ defines the exact number of atoms that are present in one molecule of compound.
- Empirical formula
- Molecular formula
- Formula unit
- Molecular mass
Hint:
The molecular formula is the expression of the number of atoms of each element in one molecule of a compound.
The correct answer is: Molecular formula
Molecular formula defines the exact number of atoms that are present in one molecule of compound.
The molecular formula is the expression of the number of atoms of each element in one molecule of a compound. The formula will always be some integer multiple of the formula. It represents the only whole-integer ratio of atoms during a compound.
Related Questions to study
Chemistry
For irreversible reaction, the percentage yield is more than 100 which means the reactant is converted to a product and waste.
For irreversible reaction, the percentage yield is more than 100 which means the reactant is converted to a product and waste.
ChemistryGrade-9
Chemistry
Assertion: The empirical formula of glucose is HCHO.
Reason: Molecular formula of glucose is HCHO.
Assertion: The empirical formula of glucose is HCHO.
Reason: Molecular formula of glucose is HCHO.
ChemistryGrade-9
Chemistry
What is the percentage of chlorine available in the bleaching powder?
What is the percentage of chlorine available in the bleaching powder?
ChemistryGrade-9
Chemistry
Percentage of ‘N’ in urea?
Percentage of ‘N’ in urea?
ChemistryGrade-9
Chemistry
A compound of Al and Cl is composed of 9gm of Al for every 35.5g of Cl. What is the empirical formula?
A compound of Al and Cl is composed of 9gm of Al for every 35.5g of Cl. What is the empirical formula?
ChemistryGrade-9
Chemistry
How many moles of water are present in one litre of water?
How many moles of water are present in one litre of water?
ChemistryGrade-9
Chemistry
Match the following
Column-x column-Y
- Vapor density a. 1.66 x 10-27 kg
- 1 amu b. Molecular mass x
- Empirical formula c. Collection of 6.023 x 1023 atoms
- Mole d. Simplest ration
Match the following
Column-x column-Y
- Vapor density a. 1.66 x 10-27 kg
- 1 amu b. Molecular mass x
- Empirical formula c. Collection of 6.023 x 1023 atoms
- Mole d. Simplest ration
ChemistryGrade-9
Chemistry
Atmospheric air has 78% N;21; 0.9 % Ar and 0.1 % CO2 via way of means of volume. What is the molecular mass of air within the atmosphere?
Atmospheric air has 78% N;21; 0.9 % Ar and 0.1 % CO2 via way of means of volume. What is the molecular mass of air within the atmosphere?
ChemistryGrade-9
Chemistry
The average atomic mass is the average weight of the isotopic masses of the element that is present in the isotopes of the element.
The average atomic mass is the average weight of the isotopic masses of the element that is present in the isotopes of the element.
ChemistryGrade-9
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
