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How many moles of Pb is 9.3 × 10 15atoms of Pb?
2. What is the molar mass of ethane, C2H6?
3. Find the mass of 3.65 × 10 -2mol K2SO4.
4. How many representative particles are in 2.5 mol H2O2?
5. What is the molar mass of Al2(SO4)3 ?
6. How many moles is 112 g of oxygen gas (O2) ?
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