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In: Chemistry

1.Calculate the number of molecules in 0.750 mol of methane, CH4. 2. Calculate the number of...

1.Calculate the number of molecules in 0.750 mol of methane, CH4.

2. Calculate the number of moles in 15.0 g of oxygen gas, O2.

3. Calculate the mass of 115 molecules of carbon dioxide

4. Calculate the number of molecules in 2.25 g of sulfur hexafluoride.

5. Calculate the number of carbon atoms in 1.50 g of butane, C4H10.

6. Calculate the mass of calcium chloride that contains 3.20 × 1024 atoms of chlorine.

7. Calculate the number of water molecules formed by the complete combustion of 7.21 g of ethane, C2H6

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