Question 4
Question 4 of 40
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Periodic Table
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
3. Stoichiometry
3.2. Relative masses of atoms and m...

Describe relative atomic mass, ( A_r ), as the average mass of the isotopes of an element compared to 1/12th of the mass of an atom of ( ^{12}C )

2. Atoms, elements and co...
2.3. Isotopes

Calculate the relative atomic mass of an element from the relative masses and abundances of its isotopes

3. Stoichiometry
3.3. The mole and the Avogadro cons...

Calculate percentage yield, percentage composition by mass and percentage purity, given appropriate data