Concept explainers
Interpretation:
A bar graph must be designed to indicate the mole of each element in 5.67 carat YAG where 1 carat is 0.2 g.
Concept introduction:
The number of moles can be calculated from mass and molar mass as follows:
Mole of any substance

Answer to Problem 200A
Bar graph is shown below to indicate the mole of each element as present in 5.67 carat YAG.
Explanation of Solution
Molar mass of YAG (Y3Al5O12) is 594 g/mol
Thus it can be said that one mole of YAG contains 3 moles of Y, 5 moles of Al and 12 moles of O respectively.
5.67 carat YAG
594 g YAG contains 3 moles Y.
Thus,
1 g YAG contains
Or,
1.134 g YAG contains
Similarly,
594 g YAG contains 5 moles Al.
Thus,
1 g YAG contains
And,
1.134 g YAG contains
Now,
594 g YAG contains 12 moles O.
Thus,
1 g YAG contains
And,
1.134 g YAG contains
These moles are used to make the bar graph as follows:
Thus, 5.67 cart YAG contains 0.006 mole Y, 0.010 mole Al and 0.023 mole O which are depicted in the bar graph.
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