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Zinc blende (ZnS) is an important ore of...

Zinc blende (ZnS) is an important ore of zinc . What is the amount of sulphur present in 24.35 g of pure zinc blende ( Zn=65.4 , S=32)?
How many moles of Zn atoms are present in ` 2.45xx10^(24)` atoms of zinc ?

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The correct Answer is:
S=8g, Zn=4.07 moles
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