Question
Download Solution PDFThe sum of the atomic masses of all the atoms in a molecule of the substance is -
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe sum of the atomic masses of all the atoms in a molecule of the substance is Molecular mass.
- It is calculated in practice by summing the atomic weights of the atoms making up the substance’s molecular formula
- For example, the molecular mass of water (H2O), which has two atoms of hydrogen and one atom of oxygen, is
= 2 x mass of hydrogen atom + mass of oxygen atom
= 2 x 1 + 16
= 2 + 16
= 18
- Formula mass of a molecule is the sum of the atomic weights of the atoms in the empirical formula of the compound.
- Mole corresponds to the mass of a substance that contains 6.023 x 1023 particles of the substance.
- Atomic mass is the mass of a single atom of a chemical element.
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