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Atomic Mass

What is meant...

Question

What is meant by Unified Atomic Mass?

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Solution

The unified atomic mass unit or Dalton is a standard unit of mass that quantifies mass on an atomic or molecular scale. One unified atomic mass unit is approximately the mass of one nucleon and is numerically equivalent to 1 g/mol.

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Write answers to the following questions and explain your answers.

a. Explain how the element sodium is monovalent.

b. M is a bivalent metal. Write down the steps to find the chemical formulae of its compounds formed with the radicals, sulphate and phosphate

c. Explain the need for a reference atom for atomic mass. Give some information about two reference atoms.

d. What is meant by Unified Atomic Mass.'

e. Explain with examples what is meant by a 'mole' of a substance.

Q. Calculate the atomic mass of

N

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Q. What is meant by average atomic mass?

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F e S O_{4} . 7 H_{2} O

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