Q4 of 16 Page 57

Write answers to the following questions and explain your answers.

What is meant by Unified Atomic Mass.'

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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4

Write answers to the following questions and explain your answers.

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

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Write answers to the following questions and explain your answers.

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

 4

Write answers to the following questions and explain your answers.

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

 5

Write the names of the following compounds and deduce their molecular masses.

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