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Questions and Answers
What does the molecular mass of a substance represent?
What does the molecular mass of a substance represent?
- The total number of protons in the molecule
- The volume occupied by the substance
- The sum of average atomic masses of all atoms in the molecule (correct)
- The density of the substance
How is the molecular mass of a substance calculated?
How is the molecular mass of a substance calculated?
- Multiplying average atomic mass of each element by the number of its atoms and adding them together (correct)
- Adding the number of protons and neutrons in each atom
- Subtracting the atomic masses of different elements in the molecule
- Dividing the total number of atoms by the number of elements
What is the molecular mass of carbon dioxide (CO2)?
What is the molecular mass of carbon dioxide (CO2)?
- $28.0$ u
- $44.0$ u (correct)
- $48.0$ u
- $32.0$ u
In the molecule C6H5Cl, what does '6' represent?
In the molecule C6H5Cl, what does '6' represent?
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What is the molecular mass of H2SO4?
What is the molecular mass of H2SO4?
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What is the mass of one hydrogen atom in grams?
What is the mass of one hydrogen atom in grams?
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In the present atomic mass system, what is the standard element used for determining atomic masses?
In the present atomic mass system, what is the standard element used for determining atomic masses?
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What is the exact mass assigned to an atom of carbon-12 in the atomic mass unit system?
What is the exact mass assigned to an atom of carbon-12 in the atomic mass unit system?
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How is an atomic mass unit (amu) defined in terms of the mass of a carbon-12 atom?
How is an atomic mass unit (amu) defined in terms of the mass of a carbon-12 atom?
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What unit has recently replaced the atomic mass unit (amu) and is symbolized by 'u' or 'Da'?
What unit has recently replaced the atomic mass unit (amu) and is symbolized by 'u' or 'Da'?
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