Chemistry?

Please help, im confused.

Complete the sentences below by doing the mole calculations: In 20 moles of copper (II) phosphate, there are _moles of copper ions and _ moles of oxygen atoms. A samples that contains 1.8x10^{23} atoms of lead has a mass of _g. A gold crown that contains 7.95 x 10^{22} atoms of gold has 

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  • 4 weeks ago

    In 20 moles of copper (II) phosphate ( Cu3(PO4)2 ), there are 60 moles of copper ions and 160 moles of oxygen atoms.

    A samples that contains 1.8x10^{23} atoms of lead has a mass of 62 g.

    (1.8x10^23 atoms) / (6.022 x 10^23 atoms/mol) x (207.21 g Pb/mol) = 61.9359 g

    (7.95 x 10^22 atoms Au) / (6.022 x 10^23 atoms/mol) x (196.966569 g Au/mol) =

    26.0 g Au

    [That's an exceptionally tiny crown -- about right for a mouse king.]

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