What is the mass of oxygen in 1.000 mol CuSO4.5H2O
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The formula CuSO4*5H2O indicates that you have 5 water molecules bonded to one formula unit of CuSO4. Since each formula unit of CuSO4 has 4 O atoms and each of the 5 water molecules has 1 O atom (for a total of 5), there are 9 O atoms in every formula unit. Therefore, if you have 1.000 mole of CuSO4*5H2O you will have 9 * 1.000 moles of O atoms.
To find the mass of the 9 moles of O atom you will need to multiply the 9 times the mass of one mole of O found in any Periodic Table....
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