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The molecular formula of ammonium sulfate is (NH4)2 SO4 . a. Find the gram molecular mass (GMM) of ammonium sulfate. b. Calculate the number of molecules and atoms in 1.32g of ammonium sulfate. |
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Answer» a. GMM of (NH4)2 SO4 = (14+4) × 2 + 32 + 4 × 16 = 36 + 32 + 64 = 132 g b. Mole = \(\frac{Mass}{GMM}\) = \(\frac{1.32}{132}\) = \(\frac{1}{100}\) = 0.01 number of molecules = mol x 6.022 x 1023 = 0.01 x 6.022 x 1023 number of atoms = 0.01 x 6.022 x 1023 x 15 = 0.15 x 6.022 x 1023(because, the number of atoms in 1 molecules of (NH4)2SO4 is 15) |
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